Finding the Fourth Proportional to 8,971.72, 12,380.94 and 4,993

Step by Step Solution

1. Step 1: Write the proportion equation
   8,971.72 : 12,380.94 = 4,993 : x
2. Step 2: Convert to fraction form
   8,971.72/12,380.94 = 4,993/x
3. Step 3: Cross multiply
   8,971.72x = 12,380.94 × 4,993
4. Step 4: Simplify right side
   8,971.72x = 61,818,033.42
5. Step 5: Solve for x
   x = 61,818,033.42/8,971.72
6. Step 6: Final answer
   x = 6,890.32