Finding the Fourth Proportional to 80,298.99, 120,417.32 and 42,838.63

Step by Step Solution

1. Step 1: Write the proportion equation
   80,298.99 : 120,417.32 = 42,838.63 : x
2. Step 2: Convert to fraction form
   80,298.99/120,417.32 = 42,838.63/x
3. Step 3: Cross multiply
   80,298.99x = 120,417.32 × 42,838.63
4. Step 4: Simplify right side
   80,298.99x = 5,158,512,823.12
5. Step 5: Solve for x
   x = 5,158,512,823.12/80,298.99
6. Step 6: Final answer
   x = 64,241.32