Finding the Fourth Proportional to 8,100.12, 12,151.38 and 2,904.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.12 : 12,151.38 = 2,904.78 : x
2. Step 2: Convert to fraction form
   8,100.12/12,151.38 = 2,904.78/x
3. Step 3: Cross multiply
   8,100.12x = 12,151.38 × 2,904.78
4. Step 4: Simplify right side
   8,100.12x = 35,297,085.60
5. Step 5: Solve for x
   x = 35,297,085.60/8,100.12
6. Step 6: Final answer
   x = 4,357.60