Finding the Fourth Proportional to 120,965.69, 181,478.30 and 42,080.60

Step by Step Solution

1. Step 1: Write the proportion equation
   120,965.69 : 181,478.30 = 42,080.60 : x
2. Step 2: Convert to fraction form
   120,965.69/181,478.30 = 42,080.60/x
3. Step 3: Cross multiply
   120,965.69x = 181,478.30 × 42,080.60
4. Step 4: Simplify right side
   120,965.69x = 7,636,714,633.19
5. Step 5: Solve for x
   x = 7,636,714,633.19/120,965.69
6. Step 6: Final answer
   x = 63,131.25