Finding the Fourth Proportional to 9,986.52, 14,982.15 and 4,991.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.52 : 14,982.15 = 4,991.79 : x
2. Step 2: Convert to fraction form
   9,986.52/14,982.15 = 4,991.79/x
3. Step 3: Cross multiply
   9,986.52x = 14,982.15 × 4,991.79
4. Step 4: Simplify right side
   9,986.52x = 74,787,746.55
5. Step 5: Solve for x
   x = 74,787,746.55/9,986.52
6. Step 6: Final answer
   x = 7,488.87