Finding the Fourth Proportional to 14,667.78, 21,985.14 and 7,277.55

Step by Step Solution

1. Step 1: Write the proportion equation
   14,667.78 : 21,985.14 = 7,277.55 : x
2. Step 2: Convert to fraction form
   14,667.78/21,985.14 = 7,277.55/x
3. Step 3: Cross multiply
   14,667.78x = 21,985.14 × 7,277.55
4. Step 4: Simplify right side
   14,667.78x = 159,997,955.61
5. Step 5: Solve for x
   x = 159,997,955.61/14,667.78
6. Step 6: Final answer
   x = 10,908.12