Finding the Fourth Proportional to 85,385.40, 127,906.62 and 42,561.69

Step by Step Solution

1. Step 1: Write the proportion equation
   85,385.40 : 127,906.62 = 42,561.69 : x
2. Step 2: Convert to fraction form
   85,385.40/127,906.62 = 42,561.69/x
3. Step 3: Cross multiply
   85,385.40x = 127,906.62 × 42,561.69
4. Step 4: Simplify right side
   85,385.40x = 5,443,921,909.39
5. Step 5: Solve for x
   x = 5,443,921,909.39/85,385.40
6. Step 6: Final answer
   x = 63,757.06