Finding the Fourth Proportional to 13,892.72, 20,830.86 and 5,576.66

Step by Step Solution

1. Step 1: Write the proportion equation
   13,892.72 : 20,830.86 = 5,576.66 : x
2. Step 2: Convert to fraction form
   13,892.72/20,830.86 = 5,576.66/x
3. Step 3: Cross multiply
   13,892.72x = 20,830.86 × 5,576.66
4. Step 4: Simplify right side
   13,892.72x = 116,166,623.73
5. Step 5: Solve for x
   x = 116,166,623.73/13,892.72
6. Step 6: Final answer
   x = 8,361.69