Finding the Fourth Proportional to 4,389.50, 6,061.55 and 2,820.32

Step by Step Solution

1. Step 1: Write the proportion equation
   4,389.50 : 6,061.55 = 2,820.32 : x
2. Step 2: Convert to fraction form
   4,389.50/6,061.55 = 2,820.32/x
3. Step 3: Cross multiply
   4,389.50x = 6,061.55 × 2,820.32
4. Step 4: Simplify right side
   4,389.50x = 17,095,511.75
5. Step 5: Solve for x
   x = 17,095,511.75/4,389.50
6. Step 6: Final answer
   x = 3,894.64