Finding the Fourth Proportional to 21,615.99, 29,830.01 and 12,055.89

Step by Step Solution

1. Step 1: Write the proportion equation
   21,615.99 : 29,830.01 = 12,055.89 : x
2. Step 2: Convert to fraction form
   21,615.99/29,830.01 = 12,055.89/x
3. Step 3: Cross multiply
   21,615.99x = 29,830.01 × 12,055.89
4. Step 4: Simplify right side
   21,615.99x = 359,627,258.98
5. Step 5: Solve for x
   x = 359,627,258.98/21,615.99
6. Step 6: Final answer
   x = 16,637.09