Finding the Fourth Proportional to 118,142.32, 163,034.28 and 64,426.15

Step by Step Solution

1. Step 1: Write the proportion equation
   118,142.32 : 163,034.28 = 64,426.15 : x
2. Step 2: Convert to fraction form
   118,142.32/163,034.28 = 64,426.15/x
3. Step 3: Cross multiply
   118,142.32x = 163,034.28 × 64,426.15
4. Step 4: Simplify right side
   118,142.32x = 10,503,670,978.42
5. Step 5: Solve for x
   x = 10,503,670,978.42/118,142.32
6. Step 6: Final answer
   x = 88,906.93