Finding the Third Proportional to 215,470.76 and 323,499.45

Step by Step Solution

1. Step 1: Write the proportion equation
   215,470.76 : 323,499.45 = 323,499.45 : x
2. Step 2: Convert to fraction form
   215,470.76/323,499.45 = 323,499.45/x
3. Step 3: Cross multiply
   215,470.76x = 323,499.45 × 323,499.45
4. Step 4: Simplify right side
   215,470.76x = 104,651,891,117.50
5. Step 5: Solve for x
   x = 104,651,891,117.50/215,470.76
6. Step 6: Final answer
   x = 485,689.53