Finding the Fourth Proportional to 1,591.78, 2,196.64 and 883.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,591.78 : 2,196.64 = 883.72 : x
2. Step 2: Convert to fraction form
   1,591.78/2,196.64 = 883.72/x
3. Step 3: Cross multiply
   1,591.78x = 2,196.64 × 883.72
4. Step 4: Simplify right side
   1,591.78x = 1,941,214.70
5. Step 5: Solve for x
   x = 1,941,214.70/1,591.78
6. Step 6: Final answer
   x = 1,219.52