Finding the Fourth Proportional to 13,488.77, 18,614.52 and 7,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.77 : 18,614.52 = 7,520.31 : x
2. Step 2: Convert to fraction form
   13,488.77/18,614.52 = 7,520.31/x
3. Step 3: Cross multiply
   13,488.77x = 18,614.52 × 7,520.31
4. Step 4: Simplify right side
   13,488.77x = 139,986,960.90
5. Step 5: Solve for x
   x = 139,986,960.90/13,488.77
6. Step 6: Final answer
   x = 10,378.04