Finding the Third Proportional to 148,335.75 and 318,123.56

Step by Step Solution

1. Step 1: Write the proportion equation
   148,335.75 : 318,123.56 = 318,123.56 : x
2. Step 2: Convert to fraction form
   148,335.75/318,123.56 = 318,123.56/x
3. Step 3: Cross multiply
   148,335.75x = 318,123.56 × 318,123.56
4. Step 4: Simplify right side
   148,335.75x = 101,202,601,017.69
5. Step 5: Solve for x
   x = 101,202,601,017.69/148,335.75
6. Step 6: Final answer
   x = 682,253.61