Finding the Third Proportional to 5,488.50 and 8,490

Step by Step Solution

1. Step 1: Write the proportion equation
   5,488.50 : 8,490 = 8,490 : x
2. Step 2: Convert to fraction form
   5,488.50/8,490 = 8,490/x
3. Step 3: Cross multiply
   5,488.50x = 8,490 × 8,490
4. Step 4: Simplify right side
   5,488.50x = 72,080,100
5. Step 5: Solve for x
   x = 72,080,100/5,488.50
6. Step 6: Final answer
   x = 13,132.93