Finding the Fourth Proportional to 1,216,037,391.86, 1,678,134,073.59 and 659,120,816.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,037,391.86 : 1,678,134,073.59 = 659,120,816.18 : x
2. Step 2: Convert to fraction form
   1,216,037,391.86/1,678,134,073.59 = 659,120,816.18/x
3. Step 3: Cross multiply
   1,216,037,391.86x = 1,678,134,073.59 × 659,120,816.18
4. Step 4: Simplify right side
   1,216,037,391.86x = 1,106,093,100,248,304,256
5. Step 5: Solve for x
   x = 1,106,093,100,248,304,256/1,216,037,391.86
6. Step 6: Final answer
   x = 909,588,066.66