Finding the Third Proportional to 151,348.50 and 318,381

Step by Step Solution

1. Step 1: Write the proportion equation
   151,348.50 : 318,381 = 318,381 : x
2. Step 2: Convert to fraction form
   151,348.50/318,381 = 318,381/x
3. Step 3: Cross multiply
   151,348.50x = 318,381 × 318,381
4. Step 4: Simplify right side
   151,348.50x = 101,366,461,161
5. Step 5: Solve for x
   x = 101,366,461,161/151,348.50
6. Step 6: Final answer
   x = 669,755.31