Finding the Fourth Proportional to 9,171.07, 12,607.43 and 7,890.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.07 : 12,607.43 = 7,890.27 : x
2. Step 2: Convert to fraction form
   9,171.07/12,607.43 = 7,890.27/x
3. Step 3: Cross multiply
   9,171.07x = 12,607.43 × 7,890.27
4. Step 4: Simplify right side
   9,171.07x = 99,476,026.71
5. Step 5: Solve for x
   x = 99,476,026.71/9,171.07
6. Step 6: Final answer
   x = 10,846.72