Finding the Fourth Proportional to 42,137.61, 63,215.52 and 12,557.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,137.61 : 63,215.52 = 12,557.82 : x
2. Step 2: Convert to fraction form
   42,137.61/63,215.52 = 12,557.82/x
3. Step 3: Cross multiply
   42,137.61x = 63,215.52 × 12,557.82
4. Step 4: Simplify right side
   42,137.61x = 793,849,121.37
5. Step 5: Solve for x
   x = 793,849,121.37/42,137.61
6. Step 6: Final answer
   x = 18,839.44