Finding the Fourth Proportional to 17,621.52, 26,429.71 and 5,138.19

Step by Step Solution

1. Step 1: Write the proportion equation
   17,621.52 : 26,429.71 = 5,138.19 : x
2. Step 2: Convert to fraction form
   17,621.52/26,429.71 = 5,138.19/x
3. Step 3: Cross multiply
   17,621.52x = 26,429.71 × 5,138.19
4. Step 4: Simplify right side
   17,621.52x = 135,800,858.78
5. Step 5: Solve for x
   x = 135,800,858.78/17,621.52
6. Step 6: Final answer
   x = 7,706.53