Finding the Fourth Proportional to 3,889.31, 5,835.10 and 1,256.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,889.31 : 5,835.10 = 1,256.76 : x
2. Step 2: Convert to fraction form
   3,889.31/5,835.10 = 1,256.76/x
3. Step 3: Cross multiply
   3,889.31x = 5,835.10 × 1,256.76
4. Step 4: Simplify right side
   3,889.31x = 7,333,320.28
5. Step 5: Solve for x
   x = 7,333,320.28/3,889.31
6. Step 6: Final answer
   x = 1,885.51