Finding the Third Proportional to 577,854 and 898,258.50

Step by Step Solution

1. Step 1: Write the proportion equation
   577,854 : 898,258.50 = 898,258.50 : x
2. Step 2: Convert to fraction form
   577,854/898,258.50 = 898,258.50/x
3. Step 3: Cross multiply
   577,854x = 898,258.50 × 898,258.50
4. Step 4: Simplify right side
   577,854x = 806,868,332,822.25
5. Step 5: Solve for x
   x = 806,868,332,822.25/577,854
6. Step 6: Final answer
   x = 1,396,318.68