Finding the Fourth Proportional to 120,994.72, 181,511.44 and 42,131.36

Step by Step Solution

1. Step 1: Write the proportion equation
   120,994.72 : 181,511.44 = 42,131.36 : x
2. Step 2: Convert to fraction form
   120,994.72/181,511.44 = 42,131.36/x
3. Step 3: Cross multiply
   120,994.72x = 181,511.44 × 42,131.36
4. Step 4: Simplify right side
   120,994.72x = 7,647,323,822.76
5. Step 5: Solve for x
   x = 7,647,323,822.76/120,994.72
6. Step 6: Final answer
   x = 63,203.78