Finding the Fourth Proportional to 9,981.98, 13,774.65 and 5,730.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.98 : 13,774.65 = 5,730.09 : x
2. Step 2: Convert to fraction form
   9,981.98/13,774.65 = 5,730.09/x
3. Step 3: Cross multiply
   9,981.98x = 13,774.65 × 5,730.09
4. Step 4: Simplify right side
   9,981.98x = 78,929,984.22
5. Step 5: Solve for x
   x = 78,929,984.22/9,981.98
6. Step 6: Final answer
   x = 7,907.25