Finding the Fourth Proportional to 13,488.84, 18,614.88 and 7,520.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.84 : 18,614.88 = 7,520.76 : x
2. Step 2: Convert to fraction form
   13,488.84/18,614.88 = 7,520.76/x
3. Step 3: Cross multiply
   13,488.84x = 18,614.88 × 7,520.76
4. Step 4: Simplify right side
   13,488.84x = 139,998,044.91
5. Step 5: Solve for x
   x = 139,998,044.91/13,488.84
6. Step 6: Final answer
   x = 10,378.81