Finding the Third Proportional to 140,686.88 and 308,057.34

Step by Step Solution

1. Step 1: Write the proportion equation
   140,686.88 : 308,057.34 = 308,057.34 : x
2. Step 2: Convert to fraction form
   140,686.88/308,057.34 = 308,057.34/x
3. Step 3: Cross multiply
   140,686.88x = 308,057.34 × 308,057.34
4. Step 4: Simplify right side
   140,686.88x = 94,899,327,038.31
5. Step 5: Solve for x
   x = 94,899,327,038.31/140,686.88
6. Step 6: Final answer
   x = 674,542.86