Finding the Fourth Proportional to 2,158,397.57, 2,978,612.79 and 1,191,528.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,397.57 : 2,978,612.79 = 1,191,528.38 : x
2. Step 2: Convert to fraction form
   2,158,397.57/2,978,612.79 = 1,191,528.38/x
3. Step 3: Cross multiply
   2,158,397.57x = 2,978,612.79 × 1,191,528.38
4. Step 4: Simplify right side
   2,158,397.57x = 3,549,101,672,315.98
5. Step 5: Solve for x
   x = 3,549,101,672,315.98/2,158,397.57
6. Step 6: Final answer
   x = 1,644,322.49