Finding the Fourth Proportional to 42,037.88, 63,069 and 12,456.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,037.88 : 63,069 = 12,456.28 : x
2. Step 2: Convert to fraction form
   42,037.88/63,069 = 12,456.28/x
3. Step 3: Cross multiply
   42,037.88x = 63,069 × 12,456.28
4. Step 4: Simplify right side
   42,037.88x = 785,605,123.32
5. Step 5: Solve for x
   x = 785,605,123.32/42,037.88
6. Step 6: Final answer
   x = 18,688.03