Finding the Fourth Proportional to 14,478.89, 19,971.76 and 11,116.58

Step by Step Solution

1. Step 1: Write the proportion equation
   14,478.89 : 19,971.76 = 11,116.58 : x
2. Step 2: Convert to fraction form
   14,478.89/19,971.76 = 11,116.58/x
3. Step 3: Cross multiply
   14,478.89x = 19,971.76 × 11,116.58
4. Step 4: Simplify right side
   14,478.89x = 222,017,667.78
5. Step 5: Solve for x
   x = 222,017,667.78/14,478.89
6. Step 6: Final answer
   x = 15,333.89