Finding the Fourth Proportional to 42,139.77, 63,203.98 and 12,552.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,139.77 : 63,203.98 = 12,552.09 : x
2. Step 2: Convert to fraction form
   42,139.77/63,203.98 = 12,552.09/x
3. Step 3: Cross multiply
   42,139.77x = 63,203.98 × 12,552.09
4. Step 4: Simplify right side
   42,139.77x = 793,342,045.32
5. Step 5: Solve for x
   x = 793,342,045.32/42,139.77
6. Step 6: Final answer
   x = 18,826.44