Finding the Fourth Proportional to 118,411.47, 163,407.17 and 64,695.11

Step by Step Solution

1. Step 1: Write the proportion equation
   118,411.47 : 163,407.17 = 64,695.11 : x
2. Step 2: Convert to fraction form
   118,411.47/163,407.17 = 64,695.11/x
3. Step 3: Cross multiply
   118,411.47x = 163,407.17 × 64,695.11
4. Step 4: Simplify right side
   118,411.47x = 10,571,644,182.64
5. Step 5: Solve for x
   x = 10,571,644,182.64/118,411.47
6. Step 6: Final answer
   x = 89,278.89