Finding the Third Proportional to 397,009.50 and 865,392

Step by Step Solution

1. Step 1: Write the proportion equation
   397,009.50 : 865,392 = 865,392 : x
2. Step 2: Convert to fraction form
   397,009.50/865,392 = 865,392/x
3. Step 3: Cross multiply
   397,009.50x = 865,392 × 865,392
4. Step 4: Simplify right side
   397,009.50x = 748,903,313,664
5. Step 5: Solve for x
   x = 748,903,313,664/397,009.50
6. Step 6: Final answer
   x = 1,886,361.19