Finding the Third Proportional to 215,090 and 325,550

Step by Step Solution

1. Step 1: Write the proportion equation
   215,090 : 325,550 = 325,550 : x
2. Step 2: Convert to fraction form
   215,090/325,550 = 325,550/x
3. Step 3: Cross multiply
   215,090x = 325,550 × 325,550
4. Step 4: Simplify right side
   215,090x = 105,982,802,500
5. Step 5: Solve for x
   x = 105,982,802,500/215,090
6. Step 6: Final answer
   x = 492,737.01