Finding the Fourth Proportional to 2,157,132,890.79, 2,978,899,322.72 and 2,039,613,661.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,132,890.79 : 2,978,899,322.72 = 2,039,613,661.17 : x
2. Step 2: Convert to fraction form
   2,157,132,890.79/2,978,899,322.72 = 2,039,613,661.17/x
3. Step 3: Cross multiply
   2,157,132,890.79x = 2,978,899,322.72 × 2,039,613,661.17
4. Step 4: Simplify right side
   2,157,132,890.79x = 6,075,803,753,859,574,784
5. Step 5: Solve for x
   x = 6,075,803,753,859,574,784/2,157,132,890.79
6. Step 6: Final answer
   x = 2,816,610,779.89