Finding the Fourth Proportional to 60,729, 91,140.54 and 42,139.56

Step by Step Solution

1. Step 1: Write the proportion equation
   60,729 : 91,140.54 = 42,139.56 : x
2. Step 2: Convert to fraction form
   60,729/91,140.54 = 42,139.56/x
3. Step 3: Cross multiply
   60,729x = 91,140.54 × 42,139.56
4. Step 4: Simplify right side
   60,729x = 3,840,622,253.76
5. Step 5: Solve for x
   x = 3,840,622,253.76/60,729
6. Step 6: Final answer
   x = 63,241.98