Finding the Fourth Proportional to 9,981.12, 13,774.62 and 5,789.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.12 : 13,774.62 = 5,789.37 : x
2. Step 2: Convert to fraction form
   9,981.12/13,774.62 = 5,789.37/x
3. Step 3: Cross multiply
   9,981.12x = 13,774.62 × 5,789.37
4. Step 4: Simplify right side
   9,981.12x = 79,746,328.93
5. Step 5: Solve for x
   x = 79,746,328.93/9,981.12
6. Step 6: Final answer
   x = 7,989.72