Finding the Fourth Proportional to 10,156.21, 13,984.41 and 8,890.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,156.21 : 13,984.41 = 8,890.18 : x
2. Step 2: Convert to fraction form
   10,156.21/13,984.41 = 8,890.18/x
3. Step 3: Cross multiply
   10,156.21x = 13,984.41 × 8,890.18
4. Step 4: Simplify right side
   10,156.21x = 124,323,920.47
5. Step 5: Solve for x
   x = 124,323,920.47/10,156.21
6. Step 6: Final answer
   x = 12,241.18