Finding the Fourth Proportional to 42,517.56, 63,779.90 and 12,935.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,517.56 : 63,779.90 = 12,935.62 : x
2. Step 2: Convert to fraction form
   42,517.56/63,779.90 = 12,935.62/x
3. Step 3: Cross multiply
   42,517.56x = 63,779.90 × 12,935.62
4. Step 4: Simplify right side
   42,517.56x = 825,032,550.04
5. Step 5: Solve for x
   x = 825,032,550.04/42,517.56
6. Step 6: Final answer
   x = 19,404.51