Finding the Third Proportional to 172,089 and 369,090

Step by Step Solution

1. Step 1: Write the proportion equation
   172,089 : 369,090 = 369,090 : x
2. Step 2: Convert to fraction form
   172,089/369,090 = 369,090/x
3. Step 3: Cross multiply
   172,089x = 369,090 × 369,090
4. Step 4: Simplify right side
   172,089x = 136,227,428,100
5. Step 5: Solve for x
   x = 136,227,428,100/172,089
6. Step 6: Final answer
   x = 791,610.32