Finding the Fourth Proportional to 8,764.32, 12,093.33 and 5,178.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,764.32 : 12,093.33 = 5,178.78 : x
2. Step 2: Convert to fraction form
   8,764.32/12,093.33 = 5,178.78/x
3. Step 3: Cross multiply
   8,764.32x = 12,093.33 × 5,178.78
4. Step 4: Simplify right side
   8,764.32x = 62,628,695.54
5. Step 5: Solve for x
   x = 62,628,695.54/8,764.32
6. Step 6: Final answer
   x = 7,145.87