Finding the Third Proportional to 151,521.50 and 318,703

Step by Step Solution

1. Step 1: Write the proportion equation
   151,521.50 : 318,703 = 318,703 : x
2. Step 2: Convert to fraction form
   151,521.50/318,703 = 318,703/x
3. Step 3: Cross multiply
   151,521.50x = 318,703 × 318,703
4. Step 4: Simplify right side
   151,521.50x = 101,571,602,209
5. Step 5: Solve for x
   x = 101,571,602,209/151,521.50
6. Step 6: Final answer
   x = 670,344.49