Finding the Fourth Proportional to 1,550.92, 2,140.32 and 887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,550.92 : 2,140.32 = 887.72 : x
2. Step 2: Convert to fraction form
   1,550.92/2,140.32 = 887.72/x
3. Step 3: Cross multiply
   1,550.92x = 2,140.32 × 887.72
4. Step 4: Simplify right side
   1,550.92x = 1,900,004.87
5. Step 5: Solve for x
   x = 1,900,004.87/1,550.92
6. Step 6: Final answer
   x = 1,225.08