Finding the Fourth Proportional to 14,665.93, 21,986.52 and 9,972.79

Step by Step Solution

1. Step 1: Write the proportion equation
   14,665.93 : 21,986.52 = 9,972.79 : x
2. Step 2: Convert to fraction form
   14,665.93/21,986.52 = 9,972.79/x
3. Step 3: Cross multiply
   14,665.93x = 21,986.52 × 9,972.79
4. Step 4: Simplify right side
   14,665.93x = 219,266,946.79
5. Step 5: Solve for x
   x = 219,266,946.79/14,665.93
6. Step 6: Final answer
   x = 14,950.77