Finding the Fourth Proportional to 21,348.52, 29,458.72 and 12,394.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,348.52 : 29,458.72 = 12,394.29 : x
2. Step 2: Convert to fraction form
   21,348.52/29,458.72 = 12,394.29/x
3. Step 3: Cross multiply
   21,348.52x = 29,458.72 × 12,394.29
4. Step 4: Simplify right side
   21,348.52x = 365,119,918.71
5. Step 5: Solve for x
   x = 365,119,918.71/21,348.52
6. Step 6: Final answer
   x = 17,102.82