Finding the Fourth Proportional to 118,411.24, 163,405.60 and 64,695.10

Step by Step Solution

1. Step 1: Write the proportion equation
   118,411.24 : 163,405.60 = 64,695.10 : x
2. Step 2: Convert to fraction form
   118,411.24/163,405.60 = 64,695.10/x
3. Step 3: Cross multiply
   118,411.24x = 163,405.60 × 64,695.10
4. Step 4: Simplify right side
   118,411.24x = 10,571,541,917.69
5. Step 5: Solve for x
   x = 10,571,541,917.69/118,411.24
6. Step 6: Final answer
   x = 89,278.20