Finding the Third Proportional to 5,613.50 and 8,490.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,613.50 : 8,490.75 = 8,490.75 : x
2. Step 2: Convert to fraction form
   5,613.50/8,490.75 = 8,490.75/x
3. Step 3: Cross multiply
   5,613.50x = 8,490.75 × 8,490.75
4. Step 4: Simplify right side
   5,613.50x = 72,092,835.56
5. Step 5: Solve for x
   x = 72,092,835.56/5,613.50
6. Step 6: Final answer
   x = 12,842.76