Finding the Third Proportional to 153,017.50 and 331,445

Step by Step Solution

1. Step 1: Write the proportion equation
   153,017.50 : 331,445 = 331,445 : x
2. Step 2: Convert to fraction form
   153,017.50/331,445 = 331,445/x
3. Step 3: Cross multiply
   153,017.50x = 331,445 × 331,445
4. Step 4: Simplify right side
   153,017.50x = 109,855,788,025
5. Step 5: Solve for x
   x = 109,855,788,025/153,017.50
6. Step 6: Final answer
   x = 717,929.57