Finding the Fourth Proportional to 9,990.39, 14,992.27 and 4,147

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.39 : 14,992.27 = 4,147 : x
2. Step 2: Convert to fraction form
   9,990.39/14,992.27 = 4,147/x
3. Step 3: Cross multiply
   9,990.39x = 14,992.27 × 4,147
4. Step 4: Simplify right side
   9,990.39x = 62,172,943.69
5. Step 5: Solve for x
   x = 62,172,943.69/9,990.39
6. Step 6: Final answer
   x = 6,223.27