Finding the Fourth Proportional to 9,981.54, 13,774.05 and 5,729.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.54 : 13,774.05 = 5,729.63 : x
2. Step 2: Convert to fraction form
   9,981.54/13,774.05 = 5,729.63/x
3. Step 3: Cross multiply
   9,981.54x = 13,774.05 × 5,729.63
4. Step 4: Simplify right side
   9,981.54x = 78,920,141.23
5. Step 5: Solve for x
   x = 78,920,141.23/9,981.54
6. Step 6: Final answer
   x = 7,906.61