Finding the Fourth Proportional to 17,423.81, 26,139.69 and 5,578.39

Step by Step Solution

1. Step 1: Write the proportion equation
   17,423.81 : 26,139.69 = 5,578.39 : x
2. Step 2: Convert to fraction form
   17,423.81/26,139.69 = 5,578.39/x
3. Step 3: Cross multiply
   17,423.81x = 26,139.69 × 5,578.39
4. Step 4: Simplify right side
   17,423.81x = 145,817,328.04
5. Step 5: Solve for x
   x = 145,817,328.04/17,423.81
6. Step 6: Final answer
   x = 8,368.85