Finding the Third Proportional to 149,065.31 and 321,899.06

Step by Step Solution

1. Step 1: Write the proportion equation
   149,065.31 : 321,899.06 = 321,899.06 : x
2. Step 2: Convert to fraction form
   149,065.31/321,899.06 = 321,899.06/x
3. Step 3: Cross multiply
   149,065.31x = 321,899.06 × 321,899.06
4. Step 4: Simplify right side
   149,065.31x = 103,619,006,438.38
5. Step 5: Solve for x
   x = 103,619,006,438.38/149,065.31
6. Step 6: Final answer
   x = 695,124.87