Finding the Fourth Proportional to 118,104.21, 162,981.72 and 64,385.91

Step by Step Solution

1. Step 1: Write the proportion equation
   118,104.21 : 162,981.72 = 64,385.91 : x
2. Step 2: Convert to fraction form
   118,104.21/162,981.72 = 64,385.91/x
3. Step 3: Cross multiply
   118,104.21x = 162,981.72 × 64,385.91
4. Step 4: Simplify right side
   118,104.21x = 10,493,726,355.57
5. Step 5: Solve for x
   x = 10,493,726,355.57/118,104.21
6. Step 6: Final answer
   x = 88,851.42