Finding the Fourth Proportional to 2,551.78, 3,521.37 and 1,432.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.78 : 3,521.37 = 1,432.81 : x
2. Step 2: Convert to fraction form
   2,551.78/3,521.37 = 1,432.81/x
3. Step 3: Cross multiply
   2,551.78x = 3,521.37 × 1,432.81
4. Step 4: Simplify right side
   2,551.78x = 5,045,454.15
5. Step 5: Solve for x
   x = 5,045,454.15/2,551.78
6. Step 6: Final answer
   x = 1,977.23