Finding the Fourth Proportional to 120,853.83, 181,284.32 and 57,680.61

Step by Step Solution

1. Step 1: Write the proportion equation
   120,853.83 : 181,284.32 = 57,680.61 : x
2. Step 2: Convert to fraction form
   120,853.83/181,284.32 = 57,680.61/x
3. Step 3: Cross multiply
   120,853.83x = 181,284.32 × 57,680.61
4. Step 4: Simplify right side
   120,853.83x = 10,456,590,161.04
5. Step 5: Solve for x
   x = 10,456,590,161.04/120,853.83
6. Step 6: Final answer
   x = 86,522.62