Finding the Fourth Proportional to 2,251.28, 3,106.56 and 1,307.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,251.28 : 3,106.56 = 1,307.24 : x
2. Step 2: Convert to fraction form
   2,251.28/3,106.56 = 1,307.24/x
3. Step 3: Cross multiply
   2,251.28x = 3,106.56 × 1,307.24
4. Step 4: Simplify right side
   2,251.28x = 4,061,019.49
5. Step 5: Solve for x
   x = 4,061,019.49/2,251.28
6. Step 6: Final answer
   x = 1,803.87