Finding the Third Proportional to 156,373.50 and 318,279

Step by Step Solution

1. Step 1: Write the proportion equation
   156,373.50 : 318,279 = 318,279 : x
2. Step 2: Convert to fraction form
   156,373.50/318,279 = 318,279/x
3. Step 3: Cross multiply
   156,373.50x = 318,279 × 318,279
4. Step 4: Simplify right side
   156,373.50x = 101,301,521,841
5. Step 5: Solve for x
   x = 101,301,521,841/156,373.50
6. Step 6: Final answer
   x = 647,817.70