Finding the Fourth Proportional to 10,947.45, 15,099.15 and 9,437.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,947.45 : 15,099.15 = 9,437.61 : x
2. Step 2: Convert to fraction form
   10,947.45/15,099.15 = 9,437.61/x
3. Step 3: Cross multiply
   10,947.45x = 15,099.15 × 9,437.61
4. Step 4: Simplify right side
   10,947.45x = 142,499,889.03
5. Step 5: Solve for x
   x = 142,499,889.03/10,947.45
6. Step 6: Final answer
   x = 13,016.72