Finding the Third Proportional to 331,485.75 and 725,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   331,485.75 : 725,665.50 = 725,665.50 : x
2. Step 2: Convert to fraction form
   331,485.75/725,665.50 = 725,665.50/x
3. Step 3: Cross multiply
   331,485.75x = 725,665.50 × 725,665.50
4. Step 4: Simplify right side
   331,485.75x = 526,590,417,890.25
5. Step 5: Solve for x
   x = 526,590,417,890.25/331,485.75
6. Step 6: Final answer
   x = 1,588,576.34