Finding the Fourth Proportional to 13,171.53, 19,762.64 and 5,772.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,171.53 : 19,762.64 = 5,772.09 : x
2. Step 2: Convert to fraction form
   13,171.53/19,762.64 = 5,772.09/x
3. Step 3: Cross multiply
   13,171.53x = 19,762.64 × 5,772.09
4. Step 4: Simplify right side
   13,171.53x = 114,071,707.86
5. Step 5: Solve for x
   x = 114,071,707.86/13,171.53
6. Step 6: Final answer
   x = 8,660.48