Finding the Third Proportional to 469.55 and 715.39

Step by Step Solution

1. Step 1: Write the proportion equation
   469.55 : 715.39 = 715.39 : x
2. Step 2: Convert to fraction form
   469.55/715.39 = 715.39/x
3. Step 3: Cross multiply
   469.55x = 715.39 × 715.39
4. Step 4: Simplify right side
   469.55x = 511,789.34
5. Step 5: Solve for x
   x = 511,789.34/469.55
6. Step 6: Final answer
   x = 1,089.96