Finding the Fourth Proportional to 2,591.28, 3,887.42 and 1,031.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.28 : 3,887.42 = 1,031.00 : x
2. Step 2: Convert to fraction form
   2,591.28/3,887.42 = 1,031.00/x
3. Step 3: Cross multiply
   2,591.28x = 3,887.42 × 1,031.00
4. Step 4: Simplify right side
   2,591.28x = 4,007,905.43
5. Step 5: Solve for x
   x = 4,007,905.43/2,591.28
6. Step 6: Final answer
   x = 1,546.69