Finding the Third Proportional to 148,907.25 and 321,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,907.25 : 321,142.50 = 321,142.50 : x
2. Step 2: Convert to fraction form
   148,907.25/321,142.50 = 321,142.50/x
3. Step 3: Cross multiply
   148,907.25x = 321,142.50 × 321,142.50
4. Step 4: Simplify right side
   148,907.25x = 103,132,505,306.25
5. Step 5: Solve for x
   x = 103,132,505,306.25/148,907.25
6. Step 6: Final answer
   x = 692,595.59