Finding the Fourth Proportional to 28,102.72, 42,169.83 and 17,571.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,102.72 : 42,169.83 = 17,571.10 : x
2. Step 2: Convert to fraction form
   28,102.72/42,169.83 = 17,571.10/x
3. Step 3: Cross multiply
   28,102.72x = 42,169.83 × 17,571.10
4. Step 4: Simplify right side
   28,102.72x = 740,970,299.91
5. Step 5: Solve for x
   x = 740,970,299.91/28,102.72
6. Step 6: Final answer
   x = 26,366.50