Finding the Fourth Proportional to 3,903.89, 5,857.46 and 1,307.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,903.89 : 5,857.46 = 1,307.03 : x
2. Step 2: Convert to fraction form
   3,903.89/5,857.46 = 1,307.03/x
3. Step 3: Cross multiply
   3,903.89x = 5,857.46 × 1,307.03
4. Step 4: Simplify right side
   3,903.89x = 7,655,869.41
5. Step 5: Solve for x
   x = 7,655,869.41/3,903.89
6. Step 6: Final answer
   x = 1,961.09