Finding the Fourth Proportional to 8,334.42, 12,490.78 and 3,398.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,334.42 : 12,490.78 = 3,398.28 : x
2. Step 2: Convert to fraction form
   8,334.42/12,490.78 = 3,398.28/x
3. Step 3: Cross multiply
   8,334.42x = 12,490.78 × 3,398.28
4. Step 4: Simplify right side
   8,334.42x = 42,447,167.86
5. Step 5: Solve for x
   x = 42,447,167.86/8,334.42
6. Step 6: Final answer
   x = 5,093.00