Finding the Third Proportional to 552,636 and 878,776.88

Step by Step Solution

1. Step 1: Write the proportion equation
   552,636 : 878,776.88 = 878,776.88 : x
2. Step 2: Convert to fraction form
   552,636/878,776.88 = 878,776.88/x
3. Step 3: Cross multiply
   552,636x = 878,776.88 × 878,776.88
4. Step 4: Simplify right side
   552,636x = 772,248,796,034.77
5. Step 5: Solve for x
   x = 772,248,796,034.77/552,636
6. Step 6: Final answer
   x = 1,397,391.40