Finding the Fourth Proportional to 42,372.49, 63,557.07 and 12,789.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,372.49 : 63,557.07 = 12,789.52 : x
2. Step 2: Convert to fraction form
   42,372.49/63,557.07 = 12,789.52/x
3. Step 3: Cross multiply
   42,372.49x = 63,557.07 × 12,789.52
4. Step 4: Simplify right side
   42,372.49x = 812,864,417.91
5. Step 5: Solve for x
   x = 812,864,417.91/42,372.49
6. Step 6: Final answer
   x = 19,183.78