Finding the Fourth Proportional to 28,250.10, 42,358.50 and 10,721.16

Step by Step Solution

1. Step 1: Write the proportion equation
   28,250.10 : 42,358.50 = 10,721.16 : x
2. Step 2: Convert to fraction form
   28,250.10/42,358.50 = 10,721.16/x
3. Step 3: Cross multiply
   28,250.10x = 42,358.50 × 10,721.16
4. Step 4: Simplify right side
   28,250.10x = 454,132,255.86
5. Step 5: Solve for x
   x = 454,132,255.86/28,250.10
6. Step 6: Final answer
   x = 16,075.42