Finding the Fourth Proportional to 42,517.91, 63,778.22 and 12,935.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,517.91 : 63,778.22 = 12,935.53 : x
2. Step 2: Convert to fraction form
   42,517.91/63,778.22 = 12,935.53/x
3. Step 3: Cross multiply
   42,517.91x = 63,778.22 × 12,935.53
4. Step 4: Simplify right side
   42,517.91x = 825,005,141.71
5. Step 5: Solve for x
   x = 825,005,141.71/42,517.91
6. Step 6: Final answer
   x = 19,403.71