Finding the Fourth Proportional to 11,010.31, 16,518.17 and 5,160.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,010.31 : 16,518.17 = 5,160.10 : x
2. Step 2: Convert to fraction form
   11,010.31/16,518.17 = 5,160.10/x
3. Step 3: Cross multiply
   11,010.31x = 16,518.17 × 5,160.10
4. Step 4: Simplify right side
   11,010.31x = 85,235,409.02
5. Step 5: Solve for x
   x = 85,235,409.02/11,010.31
6. Step 6: Final answer
   x = 7,741.42