Finding the Fourth Proportional to 1,559.32, 2,151.69 and 887.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.32 : 2,151.69 = 887.11 : x
2. Step 2: Convert to fraction form
   1,559.32/2,151.69 = 887.11/x
3. Step 3: Cross multiply
   1,559.32x = 2,151.69 × 887.11
4. Step 4: Simplify right side
   1,559.32x = 1,908,785.72
5. Step 5: Solve for x
   x = 1,908,785.72/1,559.32
6. Step 6: Final answer
   x = 1,224.11