Finding the Fourth Proportional to 11,854.54, 17,783.84 and 5,280.58

Step by Step Solution

1. Step 1: Write the proportion equation
   11,854.54 : 17,783.84 = 5,280.58 : x
2. Step 2: Convert to fraction form
   11,854.54/17,783.84 = 5,280.58/x
3. Step 3: Cross multiply
   11,854.54x = 17,783.84 × 5,280.58
4. Step 4: Simplify right side
   11,854.54x = 93,908,989.83
5. Step 5: Solve for x
   x = 93,908,989.83/11,854.54
6. Step 6: Final answer
   x = 7,921.77