Finding the Fourth Proportional to 7,928.32, 10,945.60 and 5,279.36

Step by Step Solution

1. Step 1: Write the proportion equation
   7,928.32 : 10,945.60 = 5,279.36 : x
2. Step 2: Convert to fraction form
   7,928.32/10,945.60 = 5,279.36/x
3. Step 3: Cross multiply
   7,928.32x = 10,945.60 × 5,279.36
4. Step 4: Simplify right side
   7,928.32x = 57,785,762.82
5. Step 5: Solve for x
   x = 57,785,762.82/7,928.32
6. Step 6: Final answer
   x = 7,288.53