Finding the Fourth Proportional to 42,569.55, 63,862.71 and 12,584.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,569.55 : 63,862.71 = 12,584.31 : x
2. Step 2: Convert to fraction form
   42,569.55/63,862.71 = 12,584.31/x
3. Step 3: Cross multiply
   42,569.55x = 63,862.71 × 12,584.31
4. Step 4: Simplify right side
   42,569.55x = 803,667,757.85
5. Step 5: Solve for x
   x = 803,667,757.85/42,569.55
6. Step 6: Final answer
   x = 18,878.94