Finding the Fourth Proportional to 80,730.52, 121,111.74 and 28,141.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,730.52 : 121,111.74 = 28,141.72 : x
2. Step 2: Convert to fraction form
   80,730.52/121,111.74 = 28,141.72/x
3. Step 3: Cross multiply
   80,730.52x = 121,111.74 × 28,141.72
4. Step 4: Simplify right side
   80,730.52x = 3,408,292,675.79
5. Step 5: Solve for x
   x = 3,408,292,675.79/80,730.52
6. Step 6: Final answer
   x = 42,218.14