Finding the Fourth Proportional to 80,208.70, 120,271.52 and 42,758.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,208.70 : 120,271.52 = 42,758.72 : x
2. Step 2: Convert to fraction form
   80,208.70/120,271.52 = 42,758.72/x
3. Step 3: Cross multiply
   80,208.70x = 120,271.52 × 42,758.72
4. Step 4: Simplify right side
   80,208.70x = 5,142,655,646.30
5. Step 5: Solve for x
   x = 5,142,655,646.30/80,208.70
6. Step 6: Final answer
   x = 64,115.93