Finding the Fourth Proportional to 13,317.61, 19,974.52 and 5,423.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,317.61 : 19,974.52 = 5,423.57 : x
2. Step 2: Convert to fraction form
   13,317.61/19,974.52 = 5,423.57/x
3. Step 3: Cross multiply
   13,317.61x = 19,974.52 × 5,423.57
4. Step 4: Simplify right side
   13,317.61x = 108,333,148.32
5. Step 5: Solve for x
   x = 108,333,148.32/13,317.61
6. Step 6: Final answer
   x = 8,134.58