Finding the Fourth Proportional to 21,300.87, 29,395.33 and 12,353.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.87 : 29,395.33 = 12,353.69 : x
2. Step 2: Convert to fraction form
   21,300.87/29,395.33 = 12,353.69/x
3. Step 3: Cross multiply
   21,300.87x = 29,395.33 × 12,353.69
4. Step 4: Simplify right side
   21,300.87x = 363,140,836.87
5. Step 5: Solve for x
   x = 363,140,836.87/21,300.87
6. Step 6: Final answer
   x = 17,048.17