Finding the Fourth Proportional to 9,051.44, 12,489.72 and 5,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,051.44 : 12,489.72 = 5,072.24 : x
2. Step 2: Convert to fraction form
   9,051.44/12,489.72 = 5,072.24/x
3. Step 3: Cross multiply
   9,051.44x = 12,489.72 × 5,072.24
4. Step 4: Simplify right side
   9,051.44x = 63,350,857.37
5. Step 5: Solve for x
   x = 63,350,857.37/9,051.44
6. Step 6: Final answer
   x = 6,998.98