Finding the Third Proportional to 123,988 and 270,090

Step by Step Solution

1. Step 1: Write the proportion equation
   123,988 : 270,090 = 270,090 : x
2. Step 2: Convert to fraction form
   123,988/270,090 = 270,090/x
3. Step 3: Cross multiply
   123,988x = 270,090 × 270,090
4. Step 4: Simplify right side
   123,988x = 72,948,608,100
5. Step 5: Solve for x
   x = 72,948,608,100/123,988
6. Step 6: Final answer
   x = 588,352.16