Finding the Fourth Proportional to 42,631.61, 63,892.69 and 20,411.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,631.61 : 63,892.69 = 20,411.69 : x
2. Step 2: Convert to fraction form
   42,631.61/63,892.69 = 20,411.69/x
3. Step 3: Cross multiply
   42,631.61x = 63,892.69 × 20,411.69
4. Step 4: Simplify right side
   42,631.61x = 1,304,157,650.65
5. Step 5: Solve for x
   x = 1,304,157,650.65/42,631.61
6. Step 6: Final answer
   x = 30,591.33