Finding the Fourth Proportional to 111,078,537.17, 153,145,942.65 and 86,256,612.05

Step by Step Solution

1. Step 1: Write the proportion equation
   111,078,537.17 : 153,145,942.65 = 86,256,612.05 : x
2. Step 2: Convert to fraction form
   111,078,537.17/153,145,942.65 = 86,256,612.05/x
3. Step 3: Cross multiply
   111,078,537.17x = 153,145,942.65 × 86,256,612.05
4. Step 4: Simplify right side
   111,078,537.17x = 13,209,850,161,426,870
5. Step 5: Solve for x
   x = 13,209,850,161,426,870/111,078,537.17
6. Step 6: Final answer
   x = 118,923,515.73