Finding the Fourth Proportional to 11,402.91, 17,109 and 5,158.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,402.91 : 17,109 = 5,158.53 : x
2. Step 2: Convert to fraction form
   11,402.91/17,109 = 5,158.53/x
3. Step 3: Cross multiply
   11,402.91x = 17,109 × 5,158.53
4. Step 4: Simplify right side
   11,402.91x = 88,257,289.77
5. Step 5: Solve for x
   x = 88,257,289.77/11,402.91
6. Step 6: Final answer
   x = 7,739.89