Finding the Fourth Proportional to 11,758.03, 17,638.69 and 3,438.65

Step by Step Solution

1. Step 1: Write the proportion equation
   11,758.03 : 17,638.69 = 3,438.65 : x
2. Step 2: Convert to fraction form
   11,758.03/17,638.69 = 3,438.65/x
3. Step 3: Cross multiply
   11,758.03x = 17,638.69 × 3,438.65
4. Step 4: Simplify right side
   11,758.03x = 60,653,281.37
5. Step 5: Solve for x
   x = 60,653,281.37/11,758.03
6. Step 6: Final answer
   x = 5,158.46