Finding the Fourth Proportional to 11,210.59, 15,462.39 and 7,229.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,210.59 : 15,462.39 = 7,229.71 : x
2. Step 2: Convert to fraction form
   11,210.59/15,462.39 = 7,229.71/x
3. Step 3: Cross multiply
   11,210.59x = 15,462.39 × 7,229.71
4. Step 4: Simplify right side
   11,210.59x = 111,788,595.61
5. Step 5: Solve for x
   x = 111,788,595.61/11,210.59
6. Step 6: Final answer
   x = 9,971.70