Finding the Fourth Proportional to 8,769.36, 13,132.56 and 5,639.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,769.36 : 13,132.56 = 5,639.52 : x
2. Step 2: Convert to fraction form
   8,769.36/13,132.56 = 5,639.52/x
3. Step 3: Cross multiply
   8,769.36x = 13,132.56 × 5,639.52
4. Step 4: Simplify right side
   8,769.36x = 74,061,334.77
5. Step 5: Solve for x
   x = 74,061,334.77/8,769.36
6. Step 6: Final answer
   x = 8,445.47