Finding the Fourth Proportional to 9,001.46, 12,421.42 and 5,644.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,001.46 : 12,421.42 = 5,644.13 : x
2. Step 2: Convert to fraction form
   9,001.46/12,421.42 = 5,644.13/x
3. Step 3: Cross multiply
   9,001.46x = 12,421.42 × 5,644.13
4. Step 4: Simplify right side
   9,001.46x = 70,108,033.05
5. Step 5: Solve for x
   x = 70,108,033.05/9,001.46
6. Step 6: Final answer
   x = 7,788.52