Finding the Third Proportional to 125,174 and 278,335.50

Step by Step Solution

1. Step 1: Write the proportion equation
   125,174 : 278,335.50 = 278,335.50 : x
2. Step 2: Convert to fraction form
   125,174/278,335.50 = 278,335.50/x
3. Step 3: Cross multiply
   125,174x = 278,335.50 × 278,335.50
4. Step 4: Simplify right side
   125,174x = 77,470,650,560.25
5. Step 5: Solve for x
   x = 77,470,650,560.25/125,174
6. Step 6: Final answer
   x = 618,903.69