Finding the Fourth Proportional to 9,888.56, 14,830.50 and 2,866.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,888.56 : 14,830.50 = 2,866.72 : x
2. Step 2: Convert to fraction form
   9,888.56/14,830.50 = 2,866.72/x
3. Step 3: Cross multiply
   9,888.56x = 14,830.50 × 2,866.72
4. Step 4: Simplify right side
   9,888.56x = 42,514,890.96
5. Step 5: Solve for x
   x = 42,514,890.96/9,888.56
6. Step 6: Final answer
   x = 4,299.40