Finding the Fourth Proportional to 2,521.81, 3,780.96 and 1,059.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.81 : 3,780.96 = 1,059.76 : x
2. Step 2: Convert to fraction form
   2,521.81/3,780.96 = 1,059.76/x
3. Step 3: Cross multiply
   2,521.81x = 3,780.96 × 1,059.76
4. Step 4: Simplify right side
   2,521.81x = 4,006,910.17
5. Step 5: Solve for x
   x = 4,006,910.17/2,521.81
6. Step 6: Final answer
   x = 1,588.90