Finding the Fourth Proportional to 42,287.74, 63,431.43 and 10,698.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,287.74 : 63,431.43 = 10,698.10 : x
2. Step 2: Convert to fraction form
   42,287.74/63,431.43 = 10,698.10/x
3. Step 3: Cross multiply
   42,287.74x = 63,431.43 × 10,698.10
4. Step 4: Simplify right side
   42,287.74x = 678,595,781.28
5. Step 5: Solve for x
   x = 678,595,781.28/42,287.74
6. Step 6: Final answer
   x = 16,047.10