Finding the Fourth Proportional to 12,824.50, 19,240.16 and 5,429.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,824.50 : 19,240.16 = 5,429.27 : x
2. Step 2: Convert to fraction form
   12,824.50/19,240.16 = 5,429.27/x
3. Step 3: Cross multiply
   12,824.50x = 19,240.16 × 5,429.27
4. Step 4: Simplify right side
   12,824.50x = 104,460,023.48
5. Step 5: Solve for x
   x = 104,460,023.48/12,824.50
6. Step 6: Final answer
   x = 8,145.35