Finding the Fourth Proportional to 9,981.20, 13,773.12 and 5,789

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.20 : 13,773.12 = 5,789 : x
2. Step 2: Convert to fraction form
   9,981.20/13,773.12 = 5,789/x
3. Step 3: Cross multiply
   9,981.20x = 13,773.12 × 5,789
4. Step 4: Simplify right side
   9,981.20x = 79,732,591.68
5. Step 5: Solve for x
   x = 79,732,591.68/9,981.20
6. Step 6: Final answer
   x = 7,988.28