Finding the Fourth Proportional to 12,775.32, 19,158 and 3,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,775.32 : 19,158 = 3,888.72 : x
2. Step 2: Convert to fraction form
   12,775.32/19,158 = 3,888.72/x
3. Step 3: Cross multiply
   12,775.32x = 19,158 × 3,888.72
4. Step 4: Simplify right side
   12,775.32x = 74,500,097.76
5. Step 5: Solve for x
   x = 74,500,097.76/12,775.32
6. Step 6: Final answer
   x = 5,831.56