Finding the Fourth Proportional to 21,613.40, 29,828.04 and 12,053.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,613.40 : 29,828.04 = 12,053.96 : x
2. Step 2: Convert to fraction form
   21,613.40/29,828.04 = 12,053.96/x
3. Step 3: Cross multiply
   21,613.40x = 29,828.04 × 12,053.96
4. Step 4: Simplify right side
   21,613.40x = 359,546,001.04
5. Step 5: Solve for x
   x = 359,546,001.04/21,613.40
6. Step 6: Final answer
   x = 16,635.33