Finding the Fourth Proportional to 14,288.34, 21,431.45 and 4,800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,288.34 : 21,431.45 = 4,800.72 : x
2. Step 2: Convert to fraction form
   14,288.34/21,431.45 = 4,800.72/x
3. Step 3: Cross multiply
   14,288.34x = 21,431.45 × 4,800.72
4. Step 4: Simplify right side
   14,288.34x = 102,886,390.64
5. Step 5: Solve for x
   x = 102,886,390.64/14,288.34
6. Step 6: Final answer
   x = 7,200.72