Finding the Fourth Proportional to 1,483.31, 2,225.61 and 789.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.31 : 2,225.61 = 789.78 : x
2. Step 2: Convert to fraction form
   1,483.31/2,225.61 = 789.78/x
3. Step 3: Cross multiply
   1,483.31x = 2,225.61 × 789.78
4. Step 4: Simplify right side
   1,483.31x = 1,757,750.61
5. Step 5: Solve for x
   x = 1,757,750.61/1,483.31
6. Step 6: Final answer
   x = 1,185.02