Finding the Fourth Proportional to 21,052.41, 29,061.78 and 13,886.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,052.41 : 29,061.78 = 13,886.55 : x
2. Step 2: Convert to fraction form
   21,052.41/29,061.78 = 13,886.55/x
3. Step 3: Cross multiply
   21,052.41x = 29,061.78 × 13,886.55
4. Step 4: Simplify right side
   21,052.41x = 403,567,861.06
5. Step 5: Solve for x
   x = 403,567,861.06/21,052.41
6. Step 6: Final answer
   x = 19,169.68