Finding the Fourth Proportional to 120,086.86, 180,133.37 and 56,892.18

Step by Step Solution

1. Step 1: Write the proportion equation
   120,086.86 : 180,133.37 = 56,892.18 : x
2. Step 2: Convert to fraction form
   120,086.86/180,133.37 = 56,892.18/x
3. Step 3: Cross multiply
   120,086.86x = 180,133.37 × 56,892.18
4. Step 4: Simplify right side
   120,086.86x = 10,248,180,110.05
5. Step 5: Solve for x
   x = 10,248,180,110.05/120,086.86
6. Step 6: Final answer
   x = 85,339.73