Finding the Third Proportional to 148,858.50 and 321,045

Step by Step Solution

1. Step 1: Write the proportion equation
   148,858.50 : 321,045 = 321,045 : x
2. Step 2: Convert to fraction form
   148,858.50/321,045 = 321,045/x
3. Step 3: Cross multiply
   148,858.50x = 321,045 × 321,045
4. Step 4: Simplify right side
   148,858.50x = 103,069,892,025
5. Step 5: Solve for x
   x = 103,069,892,025/148,858.50
6. Step 6: Final answer
   x = 692,401.79