Finding the Fourth Proportional to 2,815.32, 3,880.98 and 1,820.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,815.32 : 3,880.98 = 1,820.52 : x
2. Step 2: Convert to fraction form
   2,815.32/3,880.98 = 1,820.52/x
3. Step 3: Cross multiply
   2,815.32x = 3,880.98 × 1,820.52
4. Step 4: Simplify right side
   2,815.32x = 7,065,401.71
5. Step 5: Solve for x
   x = 7,065,401.71/2,815.32
6. Step 6: Final answer
   x = 2,509.63