Finding the Fourth Proportional to 13,076.88, 19,615.31 and 5,285.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,076.88 : 19,615.31 = 5,285.69 : x
2. Step 2: Convert to fraction form
   13,076.88/19,615.31 = 5,285.69/x
3. Step 3: Cross multiply
   13,076.88x = 19,615.31 × 5,285.69
4. Step 4: Simplify right side
   13,076.88x = 103,680,447.91
5. Step 5: Solve for x
   x = 103,680,447.91/13,076.88
6. Step 6: Final answer
   x = 7,928.53