Finding the Fourth Proportional to 2,551.25, 3,520.78 and 1,432.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,551.25 : 3,520.78 = 1,432.30 : x
2. Step 2: Convert to fraction form
   2,551.25/3,520.78 = 1,432.30/x
3. Step 3: Cross multiply
   2,551.25x = 3,520.78 × 1,432.30
4. Step 4: Simplify right side
   2,551.25x = 5,042,800.81
5. Step 5: Solve for x
   x = 5,042,800.81/2,551.25
6. Step 6: Final answer
   x = 1,976.60