Finding the Fourth Proportional to 1,550.64, 2,139.78 and 887.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.64 : 2,139.78 = 887.52 : x
2. Step 2: Convert to fraction form
   1,550.64/2,139.78 = 887.52/x
3. Step 3: Cross multiply
   1,550.64x = 2,139.78 × 887.52
4. Step 4: Simplify right side
   1,550.64x = 1,899,097.55
5. Step 5: Solve for x
   x = 1,899,097.55/1,550.64
6. Step 6: Final answer
   x = 1,224.72