Finding the Fourth Proportional to 28,126.24, 42,176.90 and 8,401.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,126.24 : 42,176.90 = 8,401.12 : x
2. Step 2: Convert to fraction form
   28,126.24/42,176.90 = 8,401.12/x
3. Step 3: Cross multiply
   28,126.24x = 42,176.90 × 8,401.12
4. Step 4: Simplify right side
   28,126.24x = 354,333,113.69
5. Step 5: Solve for x
   x = 354,333,113.69/28,126.24
6. Step 6: Final answer
   x = 12,597.96