Finding the Fourth Proportional to 9,886.86, 14,827.86 and 2,866.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.86 : 14,827.86 = 2,866.86 : x
2. Step 2: Convert to fraction form
   9,886.86/14,827.86 = 2,866.86/x
3. Step 3: Cross multiply
   9,886.86x = 14,827.86 × 2,866.86
4. Step 4: Simplify right side
   9,886.86x = 42,509,398.72
5. Step 5: Solve for x
   x = 42,509,398.72/9,886.86
6. Step 6: Final answer
   x = 4,299.59