Finding the Third Proportional to 678,607.50 and 1,055,118

Step by Step Solution

1. Step 1: Write the proportion equation
   678,607.50 : 1,055,118 = 1,055,118 : x
2. Step 2: Convert to fraction form
   678,607.50/1,055,118 = 1,055,118/x
3. Step 3: Cross multiply
   678,607.50x = 1,055,118 × 1,055,118
4. Step 4: Simplify right side
   678,607.50x = 1,113,273,993,924
5. Step 5: Solve for x
   x = 1,113,273,993,924/678,607.50
6. Step 6: Final answer
   x = 1,640,527.10