Finding the Fourth Proportional to 10,889.47, 16,340.43 and 9,062.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,889.47 : 16,340.43 = 9,062.72 : x
2. Step 2: Convert to fraction form
   10,889.47/16,340.43 = 9,062.72/x
3. Step 3: Cross multiply
   10,889.47x = 16,340.43 × 9,062.72
4. Step 4: Simplify right side
   10,889.47x = 148,088,755.33
5. Step 5: Solve for x
   x = 148,088,755.33/10,889.47
6. Step 6: Final answer
   x = 13,599.26