Finding the Fourth Proportional to 28,220.01, 42,335.69 and 9,499.29

Step by Step Solution

1. Step 1: Write the proportion equation
   28,220.01 : 42,335.69 = 9,499.29 : x
2. Step 2: Convert to fraction form
   28,220.01/42,335.69 = 9,499.29/x
3. Step 3: Cross multiply
   28,220.01x = 42,335.69 × 9,499.29
4. Step 4: Simplify right side
   28,220.01x = 402,158,949.16
5. Step 5: Solve for x
   x = 402,158,949.16/28,220.01
6. Step 6: Final answer
   x = 14,250.84