Finding the Fourth Proportional to 9,981.39, 13,773.74 and 5,731.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.39 : 13,773.74 = 5,731.47 : x
2. Step 2: Convert to fraction form
   9,981.39/13,773.74 = 5,731.47/x
3. Step 3: Cross multiply
   9,981.39x = 13,773.74 × 5,731.47
4. Step 4: Simplify right side
   9,981.39x = 78,943,748.94
5. Step 5: Solve for x
   x = 78,943,748.94/9,981.39
6. Step 6: Final answer
   x = 7,909.09