Finding the Fourth Proportional to 2,591, 3,885.72 and 1,030.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591 : 3,885.72 = 1,030.40 : x
2. Step 2: Convert to fraction form
   2,591/3,885.72 = 1,030.40/x
3. Step 3: Cross multiply
   2,591x = 3,885.72 × 1,030.40
4. Step 4: Simplify right side
   2,591x = 4,003,845.89
5. Step 5: Solve for x
   x = 4,003,845.89/2,591
6. Step 6: Final answer
   x = 1,545.29