Finding the Fourth Proportional to 9,986.72, 14,979.96 and 2,590.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.72 : 14,979.96 = 2,590.52 : x
2. Step 2: Convert to fraction form
   9,986.72/14,979.96 = 2,590.52/x
3. Step 3: Cross multiply
   9,986.72x = 14,979.96 × 2,590.52
4. Step 4: Simplify right side
   9,986.72x = 38,805,885.98
5. Step 5: Solve for x
   x = 38,805,885.98/9,986.72
6. Step 6: Final answer
   x = 3,885.75