Finding the Fourth Proportional to 13,665.42, 20,505.42 and 5,873.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,665.42 : 20,505.42 = 5,873.76 : x
2. Step 2: Convert to fraction form
   13,665.42/20,505.42 = 5,873.76/x
3. Step 3: Cross multiply
   13,665.42x = 20,505.42 × 5,873.76
4. Step 4: Simplify right side
   13,665.42x = 120,443,915.78
5. Step 5: Solve for x
   x = 120,443,915.78/13,665.42
6. Step 6: Final answer
   x = 8,813.77