Finding the Fourth Proportional to 80,427.50, 120,518.18 and 42,992.88

Step by Step Solution

1. Step 1: Write the proportion equation
   80,427.50 : 120,518.18 = 42,992.88 : x
2. Step 2: Convert to fraction form
   80,427.50/120,518.18 = 42,992.88/x
3. Step 3: Cross multiply
   80,427.50x = 120,518.18 × 42,992.88
4. Step 4: Simplify right side
   80,427.50x = 5,181,423,650.56
5. Step 5: Solve for x
   x = 5,181,423,650.56/80,427.50
6. Step 6: Final answer
   x = 64,423.53