Finding the Fourth Proportional to 8,911.60, 13,377.72 and 5,216.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,911.60 : 13,377.72 = 5,216.52 : x
2. Step 2: Convert to fraction form
   8,911.60/13,377.72 = 5,216.52/x
3. Step 3: Cross multiply
   8,911.60x = 13,377.72 × 5,216.52
4. Step 4: Simplify right side
   8,911.60x = 69,785,143.93
5. Step 5: Solve for x
   x = 69,785,143.93/8,911.60
6. Step 6: Final answer
   x = 7,830.82