Finding the Fourth Proportional to 8,128.96, 11,219.82 and 5,148.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.96 : 11,219.82 = 5,148.87 : x
2. Step 2: Convert to fraction form
   8,128.96/11,219.82 = 5,148.87/x
3. Step 3: Cross multiply
   8,128.96x = 11,219.82 × 5,148.87
4. Step 4: Simplify right side
   8,128.96x = 57,769,333.22
5. Step 5: Solve for x
   x = 57,769,333.22/8,128.96
6. Step 6: Final answer
   x = 7,106.61