Finding the Fourth Proportional to 1,550.19, 2,139.23 and 887.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.19 : 2,139.23 = 887.10 : x
2. Step 2: Convert to fraction form
   1,550.19/2,139.23 = 887.10/x
3. Step 3: Cross multiply
   1,550.19x = 2,139.23 × 887.10
4. Step 4: Simplify right side
   1,550.19x = 1,897,706.50
5. Step 5: Solve for x
   x = 1,897,706.50/1,550.19
6. Step 6: Final answer
   x = 1,224.18