Finding the Fourth Proportional to 42,155.28, 63,231.40 and 10,565.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,155.28 : 63,231.40 = 10,565.58 : x
2. Step 2: Convert to fraction form
   42,155.28/63,231.40 = 10,565.58/x
3. Step 3: Cross multiply
   42,155.28x = 63,231.40 × 10,565.58
4. Step 4: Simplify right side
   42,155.28x = 668,076,388.80
5. Step 5: Solve for x
   x = 668,076,388.80/42,155.28
6. Step 6: Final answer
   x = 15,847.99