Finding the Fourth Proportional to 1,551.33, 2,140.34 and 887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551.33 : 2,140.34 = 887.72 : x
2. Step 2: Convert to fraction form
   1,551.33/2,140.34 = 887.72/x
3. Step 3: Cross multiply
   1,551.33x = 2,140.34 × 887.72
4. Step 4: Simplify right side
   1,551.33x = 1,900,007.48
5. Step 5: Solve for x
   x = 1,900,007.48/1,551.33
6. Step 6: Final answer
   x = 1,224.76