Finding the Third Proportional to 131,708 and 279,090

Step by Step Solution

1. Step 1: Write the proportion equation
   131,708 : 279,090 = 279,090 : x
2. Step 2: Convert to fraction form
   131,708/279,090 = 279,090/x
3. Step 3: Cross multiply
   131,708x = 279,090 × 279,090
4. Step 4: Simplify right side
   131,708x = 77,891,228,100
5. Step 5: Solve for x
   x = 77,891,228,100/131,708
6. Step 6: Final answer
   x = 591,393.30