Finding the Fourth Proportional to 80,044.96, 120,139.80 and 42,636.28

Step by Step Solution

1. Step 1: Write the proportion equation
   80,044.96 : 120,139.80 = 42,636.28 : x
2. Step 2: Convert to fraction form
   80,044.96/120,139.80 = 42,636.28/x
3. Step 3: Cross multiply
   80,044.96x = 120,139.80 × 42,636.28
4. Step 4: Simplify right side
   80,044.96x = 5,122,314,151.94
5. Step 5: Solve for x
   x = 5,122,314,151.94/80,044.96
6. Step 6: Final answer
   x = 63,992.96