Finding the Third Proportional to 397,003.50 and 865,381.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,003.50 : 865,381.50 = 865,381.50 : x
2. Step 2: Convert to fraction form
   397,003.50/865,381.50 = 865,381.50/x
3. Step 3: Cross multiply
   397,003.50x = 865,381.50 × 865,381.50
4. Step 4: Simplify right side
   397,003.50x = 748,885,140,542.25
5. Step 5: Solve for x
   x = 748,885,140,542.25/397,003.50
6. Step 6: Final answer
   x = 1,886,343.93