Finding the Fourth Proportional to 118,141.32, 163,032.90 and 64,425.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,141.32 : 163,032.90 = 64,425.15 : x
2. Step 2: Convert to fraction form
   118,141.32/163,032.90 = 64,425.15/x
3. Step 3: Cross multiply
   118,141.32x = 163,032.90 × 64,425.15
4. Step 4: Simplify right side
   118,141.32x = 10,503,419,037.44
5. Step 5: Solve for x
   x = 10,503,419,037.44/118,141.32
6. Step 6: Final answer
   x = 88,905.55