Finding the Fourth Proportional to 2,570.30, 3,545.86 and 1,521.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.30 : 3,545.86 = 1,521.76 : x
2. Step 2: Convert to fraction form
   2,570.30/3,545.86 = 1,521.76/x
3. Step 3: Cross multiply
   2,570.30x = 3,545.86 × 1,521.76
4. Step 4: Simplify right side
   2,570.30x = 5,395,947.91
5. Step 5: Solve for x
   x = 5,395,947.91/2,570.30
6. Step 6: Final answer
   x = 2,099.35