Finding the Fourth Proportional to 80,738.10, 121,068.27 and 28,146.42

Step by Step Solution

1. Step 1: Write the proportion equation
   80,738.10 : 121,068.27 = 28,146.42 : x
2. Step 2: Convert to fraction form
   80,738.10/121,068.27 = 28,146.42/x
3. Step 3: Cross multiply
   80,738.10x = 121,068.27 × 28,146.42
4. Step 4: Simplify right side
   80,738.10x = 3,407,638,376.09
5. Step 5: Solve for x
   x = 3,407,638,376.09/80,738.10
6. Step 6: Final answer
   x = 42,206.08