Finding the Fourth Proportional to 80,428.88, 120,520.24 and 42,994.26

Step by Step Solution

1. Step 1: Write the proportion equation
   80,428.88 : 120,520.24 = 42,994.26 : x
2. Step 2: Convert to fraction form
   80,428.88/120,520.24 = 42,994.26/x
3. Step 3: Cross multiply
   80,428.88x = 120,520.24 × 42,994.26
4. Step 4: Simplify right side
   80,428.88x = 5,181,678,426.34
5. Step 5: Solve for x
   x = 5,181,678,426.34/80,428.88
6. Step 6: Final answer
   x = 64,425.59