Finding the Fourth Proportional to 60,806.24, 91,070.86 and 42,000.78

Step by Step Solution

1. Step 1: Write the proportion equation
   60,806.24 : 91,070.86 = 42,000.78 : x
2. Step 2: Convert to fraction form
   60,806.24/91,070.86 = 42,000.78/x
3. Step 3: Cross multiply
   60,806.24x = 91,070.86 × 42,000.78
4. Step 4: Simplify right side
   60,806.24x = 3,825,047,155.27
5. Step 5: Solve for x
   x = 3,825,047,155.27/60,806.24
6. Step 6: Final answer
   x = 62,905.50