Finding the Fourth Proportional to 118,638,238.72, 163,713,546.75 and 65,711,809.12

Step by Step Solution

1. Step 1: Write the proportion equation
   118,638,238.72 : 163,713,546.75 = 65,711,809.12 : x
2. Step 2: Convert to fraction form
   118,638,238.72/163,713,546.75 = 65,711,809.12/x
3. Step 3: Cross multiply
   118,638,238.72x = 163,713,546.75 × 65,711,809.12
4. Step 4: Simplify right side
   118,638,238.72x = 10,757,913,334,394,196
5. Step 5: Solve for x
   x = 10,757,913,334,394,196/118,638,238.72
6. Step 6: Final answer
   x = 90,678,296.06