Finding the Fourth Proportional to 14,485.64, 21,730.23 and 5,123.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,485.64 : 21,730.23 = 5,123.72 : x
2. Step 2: Convert to fraction form
   14,485.64/21,730.23 = 5,123.72/x
3. Step 3: Cross multiply
   14,485.64x = 21,730.23 × 5,123.72
4. Step 4: Simplify right side
   14,485.64x = 111,339,614.06
5. Step 5: Solve for x
   x = 111,339,614.06/14,485.64
6. Step 6: Final answer
   x = 7,686.21