Finding the Fourth Proportional to 8,880.48, 12,256.56 and 5,156.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,880.48 : 12,256.56 = 5,156.64 : x
2. Step 2: Convert to fraction form
   8,880.48/12,256.56 = 5,156.64/x
3. Step 3: Cross multiply
   8,880.48x = 12,256.56 × 5,156.64
4. Step 4: Simplify right side
   8,880.48x = 63,202,667.56
5. Step 5: Solve for x
   x = 63,202,667.56/8,880.48
6. Step 6: Final answer
   x = 7,117.03