Finding the Fourth Proportional to 1,550.23, 2,139.15 and 887.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.23 : 2,139.15 = 887.02 : x
2. Step 2: Convert to fraction form
   1,550.23/2,139.15 = 887.02/x
3. Step 3: Cross multiply
   1,550.23x = 2,139.15 × 887.02
4. Step 4: Simplify right side
   1,550.23x = 1,897,468.83
5. Step 5: Solve for x
   x = 1,897,468.83/1,550.23
6. Step 6: Final answer
   x = 1,223.99