Finding the Fourth Proportional to 118,411.72, 163,411.32 and 64,696.30

Step by Step Solution

1. Step 1: Write the proportion equation
   118,411.72 : 163,411.32 = 64,696.30 : x
2. Step 2: Convert to fraction form
   118,411.72/163,411.32 = 64,696.30/x
3. Step 3: Cross multiply
   118,411.72x = 163,411.32 × 64,696.30
4. Step 4: Simplify right side
   118,411.72x = 10,572,107,782.12
5. Step 5: Solve for x
   x = 10,572,107,782.12/118,411.72
6. Step 6: Final answer
   x = 89,282.61