Finding the Fourth Proportional to 147,589,111.20, 221,478,145.20 and 86,178,151.20

Step by Step Solution

1. Step 1: Write the proportion equation
   147,589,111.20 : 221,478,145.20 = 86,178,151.20 : x
2. Step 2: Convert to fraction form
   147,589,111.20/221,478,145.20 = 86,178,151.20/x
3. Step 3: Cross multiply
   147,589,111.20x = 221,478,145.20 × 86,178,151.20
4. Step 4: Simplify right side
   147,589,111.20x = 19,086,577,084,541,152
5. Step 5: Solve for x
   x = 19,086,577,084,541,152/147,589,111.20
6. Step 6: Final answer
   x = 129,322,393.29