Finding the Fourth Proportional to 21,998.41, 30,359.42 and 12,566.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,998.41 : 30,359.42 = 12,566.77 : x
2. Step 2: Convert to fraction form
   21,998.41/30,359.42 = 12,566.77/x
3. Step 3: Cross multiply
   21,998.41x = 30,359.42 × 12,566.77
4. Step 4: Simplify right side
   21,998.41x = 381,519,848.47
5. Step 5: Solve for x
   x = 381,519,848.47/21,998.41
6. Step 6: Final answer
   x = 17,343.06