Finding the Fourth Proportional to 11,758.79, 17,638.72 and 2,993.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,758.79 : 17,638.72 = 2,993.78 : x
2. Step 2: Convert to fraction form
   11,758.79/17,638.72 = 2,993.78/x
3. Step 3: Cross multiply
   11,758.79x = 17,638.72 × 2,993.78
4. Step 4: Simplify right side
   11,758.79x = 52,806,447.16
5. Step 5: Solve for x
   x = 52,806,447.16/11,758.79
6. Step 6: Final answer
   x = 4,490.81