Finding the Fourth Proportional to 8,961.31, 12,361.56 and 5,375.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,961.31 : 12,361.56 = 5,375.31 : x
2. Step 2: Convert to fraction form
   8,961.31/12,361.56 = 5,375.31/x
3. Step 3: Cross multiply
   8,961.31x = 12,361.56 × 5,375.31
4. Step 4: Simplify right side
   8,961.31x = 66,447,250.34
5. Step 5: Solve for x
   x = 66,447,250.34/8,961.31
6. Step 6: Final answer
   x = 7,414.90