Finding the Fourth Proportional to 14,667.78, 21,990.06 and 5,306.34

Step by Step Solution

1. Step 1: Write the proportion equation
   14,667.78 : 21,990.06 = 5,306.34 : x
2. Step 2: Convert to fraction form
   14,667.78/21,990.06 = 5,306.34/x
3. Step 3: Cross multiply
   14,667.78x = 21,990.06 × 5,306.34
4. Step 4: Simplify right side
   14,667.78x = 116,686,734.98
5. Step 5: Solve for x
   x = 116,686,734.98/14,667.78
6. Step 6: Final answer
   x = 7,955.31