Finding the Third Proportional to 140,649.75 and 308,002.50

Step by Step Solution

1. Step 1: Write the proportion equation
   140,649.75 : 308,002.50 = 308,002.50 : x
2. Step 2: Convert to fraction form
   140,649.75/308,002.50 = 308,002.50/x
3. Step 3: Cross multiply
   140,649.75x = 308,002.50 × 308,002.50
4. Step 4: Simplify right side
   140,649.75x = 94,865,540,006.25
5. Step 5: Solve for x
   x = 94,865,540,006.25/140,649.75
6. Step 6: Final answer
   x = 674,480.69