Finding the Fourth Proportional to 13,047.28, 19,570.68 and 5,255.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,047.28 : 19,570.68 = 5,255.89 : x
2. Step 2: Convert to fraction form
   13,047.28/19,570.68 = 5,255.89/x
3. Step 3: Cross multiply
   13,047.28x = 19,570.68 × 5,255.89
4. Step 4: Simplify right side
   13,047.28x = 102,861,341.31
5. Step 5: Solve for x
   x = 102,861,341.31/13,047.28
6. Step 6: Final answer
   x = 7,883.74