Finding the Fourth Proportional to 21,442.40, 29,590.72 and 12,011.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,442.40 : 29,590.72 = 12,011.52 : x
2. Step 2: Convert to fraction form
   21,442.40/29,590.72 = 12,011.52/x
3. Step 3: Cross multiply
   21,442.40x = 29,590.72 × 12,011.52
4. Step 4: Simplify right side
   21,442.40x = 355,429,525.09
5. Step 5: Solve for x
   x = 355,429,525.09/21,442.40
6. Step 6: Final answer
   x = 16,576.01