Finding the Fourth Proportional to 1,138,078.56, 1,570,414.56 and 628,750.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,138,078.56 : 1,570,414.56 = 628,750.56 : x
2. Step 2: Convert to fraction form
   1,138,078.56/1,570,414.56 = 628,750.56/x
3. Step 3: Cross multiply
   1,138,078.56x = 1,570,414.56 × 628,750.56
4. Step 4: Simplify right side
   1,138,078.56x = 987,399,034,032.15
5. Step 5: Solve for x
   x = 987,399,034,032.15/1,138,078.56
6. Step 6: Final answer
   x = 867,601.82