Finding the Fourth Proportional to 60,691.95, 91,085.55 and 42,102.78

Step by Step Solution

1. Step 1: Write the proportion equation
   60,691.95 : 91,085.55 = 42,102.78 : x
2. Step 2: Convert to fraction form
   60,691.95/91,085.55 = 42,102.78/x
3. Step 3: Cross multiply
   60,691.95x = 91,085.55 × 42,102.78
4. Step 4: Simplify right side
   60,691.95x = 3,834,954,872.83
5. Step 5: Solve for x
   x = 3,834,954,872.83/60,691.95
6. Step 6: Final answer
   x = 63,187.21