Finding the Third Proportional to 515,724.50 and 788,410

Step by Step Solution

1. Step 1: Write the proportion equation
   515,724.50 : 788,410 = 788,410 : x
2. Step 2: Convert to fraction form
   515,724.50/788,410 = 788,410/x
3. Step 3: Cross multiply
   515,724.50x = 788,410 × 788,410
4. Step 4: Simplify right side
   515,724.50x = 621,590,328,100
5. Step 5: Solve for x
   x = 621,590,328,100/515,724.50
6. Step 6: Final answer
   x = 1,205,275.93