Finding the Third Proportional to 64,486.97 and 72,483.19

Step by Step Solution

1. Step 1: Write the proportion equation
   64,486.97 : 72,483.19 = 72,483.19 : x
2. Step 2: Convert to fraction form
   64,486.97/72,483.19 = 72,483.19/x
3. Step 3: Cross multiply
   64,486.97x = 72,483.19 × 72,483.19
4. Step 4: Simplify right side
   64,486.97x = 5,253,812,470.16
5. Step 5: Solve for x
   x = 5,253,812,470.16/64,486.97
6. Step 6: Final answer
   x = 81,470.92