Finding the Fourth Proportional to 9,429.91, 13,013.38 and 5,181.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,429.91 : 13,013.38 = 5,181.06 : x
2. Step 2: Convert to fraction form
   9,429.91/13,013.38 = 5,181.06/x
3. Step 3: Cross multiply
   9,429.91x = 13,013.38 × 5,181.06
4. Step 4: Simplify right side
   9,429.91x = 67,423,102.58
5. Step 5: Solve for x
   x = 67,423,102.58/9,429.91
6. Step 6: Final answer
   x = 7,149.92