Finding the Fourth Proportional to 1,307.75, 1,957.37 and 1,256.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,307.75 : 1,957.37 = 1,256.72 : x
2. Step 2: Convert to fraction form
   1,307.75/1,957.37 = 1,256.72/x
3. Step 3: Cross multiply
   1,307.75x = 1,957.37 × 1,256.72
4. Step 4: Simplify right side
   1,307.75x = 2,459,849.96
5. Step 5: Solve for x
   x = 2,459,849.96/1,307.75
6. Step 6: Final answer
   x = 1,880.99