Finding the Fourth Proportional to 11,758.17, 17,638.91 and 3,438.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,758.17 : 17,638.91 = 3,438.81 : x
2. Step 2: Convert to fraction form
   11,758.17/17,638.91 = 3,438.81/x
3. Step 3: Cross multiply
   11,758.17x = 17,638.91 × 3,438.81
4. Step 4: Simplify right side
   11,758.17x = 60,656,912.79
5. Step 5: Solve for x
   x = 60,656,912.79/11,758.17
6. Step 6: Final answer
   x = 5,158.70