Finding the Fourth Proportional to 3,131.55, 4,322.03 and 1,787.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.55 : 4,322.03 = 1,787.15 : x
2. Step 2: Convert to fraction form
   3,131.55/4,322.03 = 1,787.15/x
3. Step 3: Cross multiply
   3,131.55x = 4,322.03 × 1,787.15
4. Step 4: Simplify right side
   3,131.55x = 7,724,117.78
5. Step 5: Solve for x
   x = 7,724,117.78/3,131.55
6. Step 6: Final answer
   x = 2,466.55