Finding the Fourth Proportional to 42,189.78, 63,288.30 and 11,025

Step by Step Solution

1. Step 1: Write the proportion equation
   42,189.78 : 63,288.30 = 11,025 : x
2. Step 2: Convert to fraction form
   42,189.78/63,288.30 = 11,025/x
3. Step 3: Cross multiply
   42,189.78x = 63,288.30 × 11,025
4. Step 4: Simplify right side
   42,189.78x = 697,753,507.50
5. Step 5: Solve for x
   x = 697,753,507.50/42,189.78
6. Step 6: Final answer
   x = 16,538.45