Finding the Third Proportional to 126,930 and 278,773.50

Step by Step Solution

1. Step 1: Write the proportion equation
   126,930 : 278,773.50 = 278,773.50 : x
2. Step 2: Convert to fraction form
   126,930/278,773.50 = 278,773.50/x
3. Step 3: Cross multiply
   126,930x = 278,773.50 × 278,773.50
4. Step 4: Simplify right side
   126,930x = 77,714,664,302.25
5. Step 5: Solve for x
   x = 77,714,664,302.25/126,930
6. Step 6: Final answer
   x = 612,263.96