Finding the Third Proportional to 316,545 and 453,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   316,545 : 453,439.50 = 453,439.50 : x
2. Step 2: Convert to fraction form
   316,545/453,439.50 = 453,439.50/x
3. Step 3: Cross multiply
   316,545x = 453,439.50 × 453,439.50
4. Step 4: Simplify right side
   316,545x = 205,607,380,160.25
5. Step 5: Solve for x
   x = 205,607,380,160.25/316,545
6. Step 6: Final answer
   x = 649,536.02