Finding the Third Proportional to 613.55 and 1,331.72

Step by Step Solution

1. Step 1: Write the proportion equation
   613.55 : 1,331.72 = 1,331.72 : x
2. Step 2: Convert to fraction form
   613.55/1,331.72 = 1,331.72/x
3. Step 3: Cross multiply
   613.55x = 1,331.72 × 1,331.72
4. Step 4: Simplify right side
   613.55x = 1,773,474.83
5. Step 5: Solve for x
   x = 1,773,474.83/613.55
6. Step 6: Final answer
   x = 2,890.53