Finding the Fourth Proportional to 9,981.72, 13,774.88 and 5,505.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.72 : 13,774.88 = 5,505.64 : x
2. Step 2: Convert to fraction form
   9,981.72/13,774.88 = 5,505.64/x
3. Step 3: Cross multiply
   9,981.72x = 13,774.88 × 5,505.64
4. Step 4: Simplify right side
   9,981.72x = 75,839,530.32
5. Step 5: Solve for x
   x = 75,839,530.32/9,981.72
6. Step 6: Final answer
   x = 7,597.84