Finding the Fourth Proportional to 12,391.04, 18,581.68 and 4,994.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,391.04 : 18,581.68 = 4,994.12 : x
2. Step 2: Convert to fraction form
   12,391.04/18,581.68 = 4,994.12/x
3. Step 3: Cross multiply
   12,391.04x = 18,581.68 × 4,994.12
4. Step 4: Simplify right side
   12,391.04x = 92,799,139.72
5. Step 5: Solve for x
   x = 92,799,139.72/12,391.04
6. Step 6: Final answer
   x = 7,489.21