Finding the Fourth Proportional to 80,875.44, 121,311.72 and 34,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,875.44 : 121,311.72 = 34,128.72 : x
2. Step 2: Convert to fraction form
   80,875.44/121,311.72 = 34,128.72/x
3. Step 3: Cross multiply
   80,875.44x = 121,311.72 × 34,128.72
4. Step 4: Simplify right side
   80,875.44x = 4,140,213,724.60
5. Step 5: Solve for x
   x = 4,140,213,724.60/80,875.44
6. Step 6: Final answer
   x = 51,192.47