Finding the Fourth Proportional to 9,981.31, 13,774.55 and 5,505.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.31 : 13,774.55 = 5,505.20 : x
2. Step 2: Convert to fraction form
   9,981.31/13,774.55 = 5,505.20/x
3. Step 3: Cross multiply
   9,981.31x = 13,774.55 × 5,505.20
4. Step 4: Simplify right side
   9,981.31x = 75,831,652.66
5. Step 5: Solve for x
   x = 75,831,652.66/9,981.31
6. Step 6: Final answer
   x = 7,597.36