Finding the Fourth Proportional to 4,389.76, 6,061.89 and 2,820.58

Step by Step Solution

1. Step 1: Write the proportion equation
   4,389.76 : 6,061.89 = 2,820.58 : x
2. Step 2: Convert to fraction form
   4,389.76/6,061.89 = 2,820.58/x
3. Step 3: Cross multiply
   4,389.76x = 6,061.89 × 2,820.58
4. Step 4: Simplify right side
   4,389.76x = 17,098,045.70
5. Step 5: Solve for x
   x = 17,098,045.70/4,389.76
6. Step 6: Final answer
   x = 3,894.98