Finding the Fourth Proportional to 11,111.78, 15,334.52 and 6,863.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,111.78 : 15,334.52 = 6,863.54 : x
2. Step 2: Convert to fraction form
   11,111.78/15,334.52 = 6,863.54/x
3. Step 3: Cross multiply
   11,111.78x = 15,334.52 × 6,863.54
4. Step 4: Simplify right side
   11,111.78x = 105,248,980.41
5. Step 5: Solve for x
   x = 105,248,980.41/11,111.78
6. Step 6: Final answer
   x = 9,471.84