Finding the Third Proportional to 148,655.25 and 309,622.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,655.25 : 309,622.50 = 309,622.50 : x
2. Step 2: Convert to fraction form
   148,655.25/309,622.50 = 309,622.50/x
3. Step 3: Cross multiply
   148,655.25x = 309,622.50 × 309,622.50
4. Step 4: Simplify right side
   148,655.25x = 95,866,092,506.25
5. Step 5: Solve for x
   x = 95,866,092,506.25/148,655.25
6. Step 6: Final answer
   x = 644,888.71