Finding the Fourth Proportional to 11,665.28, 17,488.08 and 5,086.64

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.28 : 17,488.08 = 5,086.64 : x
2. Step 2: Convert to fraction form
   11,665.28/17,488.08 = 5,086.64/x
3. Step 3: Cross multiply
   11,665.28x = 17,488.08 × 5,086.64
4. Step 4: Simplify right side
   11,665.28x = 88,955,567.25
5. Step 5: Solve for x
   x = 88,955,567.25/11,665.28
6. Step 6: Final answer
   x = 7,625.67