Finding the Third Proportional to 127,981.69 and 279,291.38

Step by Step Solution

1. Step 1: Write the proportion equation
   127,981.69 : 279,291.38 = 279,291.38 : x
2. Step 2: Convert to fraction form
   127,981.69/279,291.38 = 279,291.38/x
3. Step 3: Cross multiply
   127,981.69x = 279,291.38 × 279,291.38
4. Step 4: Simplify right side
   127,981.69x = 78,003,672,149.39
5. Step 5: Solve for x
   x = 78,003,672,149.39/127,981.69
6. Step 6: Final answer
   x = 609,490.89