Finding the Fourth Proportional to 1,550.32, 2,139.30 and 887.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.32 : 2,139.30 = 887.02 : x
2. Step 2: Convert to fraction form
   1,550.32/2,139.30 = 887.02/x
3. Step 3: Cross multiply
   1,550.32x = 2,139.30 × 887.02
4. Step 4: Simplify right side
   1,550.32x = 1,897,601.89
5. Step 5: Solve for x
   x = 1,897,601.89/1,550.32
6. Step 6: Final answer
   x = 1,224.01