Finding the Third Proportional to 312,250.50 and 649,045.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,250.50 : 649,045.50 = 649,045.50 : x
2. Step 2: Convert to fraction form
   312,250.50/649,045.50 = 649,045.50/x
3. Step 3: Cross multiply
   312,250.50x = 649,045.50 × 649,045.50
4. Step 4: Simplify right side
   312,250.50x = 421,260,061,070.25
5. Step 5: Solve for x
   x = 421,260,061,070.25/312,250.50
6. Step 6: Final answer
   x = 1,349,109.32