Finding the Fourth Proportional to 118,402.02, 163,406.07 and 64,695.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,402.02 : 163,406.07 = 64,695.15 : x
2. Step 2: Convert to fraction form
   118,402.02/163,406.07 = 64,695.15/x
3. Step 3: Cross multiply
   118,402.02x = 163,406.07 × 64,695.15
4. Step 4: Simplify right side
   118,402.02x = 10,571,580,209.56
5. Step 5: Solve for x
   x = 10,571,580,209.56/118,402.02
6. Step 6: Final answer
   x = 89,285.47