Finding the Fourth Proportional to 9,789.63, 14,686.85 and 2,864.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.63 : 14,686.85 = 2,864.13 : x
2. Step 2: Convert to fraction form
   9,789.63/14,686.85 = 2,864.13/x
3. Step 3: Cross multiply
   9,789.63x = 14,686.85 × 2,864.13
4. Step 4: Simplify right side
   9,789.63x = 42,064,999.78
5. Step 5: Solve for x
   x = 42,064,999.78/9,789.63
6. Step 6: Final answer
   x = 4,296.90