Finding the Fourth Proportional to 28,635.75, 39,519.31 and 16,061.31

Step by Step Solution

1. Step 1: Write the proportion equation
   28,635.75 : 39,519.31 = 16,061.31 : x
2. Step 2: Convert to fraction form
   28,635.75/39,519.31 = 16,061.31/x
3. Step 3: Cross multiply
   28,635.75x = 39,519.31 × 16,061.31
4. Step 4: Simplify right side
   28,635.75x = 634,732,007.77
5. Step 5: Solve for x
   x = 634,732,007.77/28,635.75
6. Step 6: Final answer
   x = 22,165.72