Finding the Third Proportional to 552,628 and 878,761.50

Step by Step Solution

1. Step 1: Write the proportion equation
   552,628 : 878,761.50 = 878,761.50 : x
2. Step 2: Convert to fraction form
   552,628/878,761.50 = 878,761.50/x
3. Step 3: Cross multiply
   552,628x = 878,761.50 × 878,761.50
4. Step 4: Simplify right side
   552,628x = 772,221,773,882.25
5. Step 5: Solve for x
   x = 772,221,773,882.25/552,628
6. Step 6: Final answer
   x = 1,397,362.74