Finding the Third Proportional to 396,697.50 and 872,116.88

Step by Step Solution

1. Step 1: Write the proportion equation
   396,697.50 : 872,116.88 = 872,116.88 : x
2. Step 2: Convert to fraction form
   396,697.50/872,116.88 = 872,116.88/x
3. Step 3: Cross multiply
   396,697.50x = 872,116.88 × 872,116.88
4. Step 4: Simplify right side
   396,697.50x = 760,587,843,659.77
5. Step 5: Solve for x
   x = 760,587,843,659.77/396,697.50
6. Step 6: Final answer
   x = 1,917,299.31