Finding the Fourth Proportional to 42,500.46, 63,757.98 and 12,921.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42,500.46 : 63,757.98 = 12,921.24 : x
2. Step 2: Convert to fraction form
   42,500.46/63,757.98 = 12,921.24/x
3. Step 3: Cross multiply
   42,500.46x = 63,757.98 × 12,921.24
4. Step 4: Simplify right side
   42,500.46x = 823,832,161.50
5. Step 5: Solve for x
   x = 823,832,161.50/42,500.46
6. Step 6: Final answer
   x = 19,384.08