Finding the Third Proportional to 397,300.50 and 858,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,300.50 : 858,256.50 = 858,256.50 : x
2. Step 2: Convert to fraction form
   397,300.50/858,256.50 = 858,256.50/x
3. Step 3: Cross multiply
   397,300.50x = 858,256.50 × 858,256.50
4. Step 4: Simplify right side
   397,300.50x = 736,604,219,792.25
5. Step 5: Solve for x
   x = 736,604,219,792.25/397,300.50
6. Step 6: Final answer
   x = 1,854,022.89