Finding the Fourth Proportional to 21,302.81, 29,397.98 and 12,355.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,302.81 : 29,397.98 = 12,355.62 : x
2. Step 2: Convert to fraction form
   21,302.81/29,397.98 = 12,355.62/x
3. Step 3: Cross multiply
   21,302.81x = 29,397.98 × 12,355.62
4. Step 4: Simplify right side
   21,302.81x = 363,230,300.54
5. Step 5: Solve for x
   x = 363,230,300.54/21,302.81
6. Step 6: Final answer
   x = 17,050.81