Finding the Fourth Proportional to 21,302.52, 29,397.42 and 12,355.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,302.52 : 29,397.42 = 12,355.22 : x
2. Step 2: Convert to fraction form
   21,302.52/29,397.42 = 12,355.22/x
3. Step 3: Cross multiply
   21,302.52x = 29,397.42 × 12,355.22
4. Step 4: Simplify right side
   21,302.52x = 363,211,591.53
5. Step 5: Solve for x
   x = 363,211,591.53/21,302.52
6. Step 6: Final answer
   x = 17,050.17