Finding the Fourth Proportional to 2,886.69, 4,331.58 and 2,835.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,886.69 : 4,331.58 = 2,835.20 : x
2. Step 2: Convert to fraction form
   2,886.69/4,331.58 = 2,835.20/x
3. Step 3: Cross multiply
   2,886.69x = 4,331.58 × 2,835.20
4. Step 4: Simplify right side
   2,886.69x = 12,280,895.81
5. Step 5: Solve for x
   x = 12,280,895.81/2,886.69
6. Step 6: Final answer
   x = 4,254.32