Finding the Fourth Proportional to 78,285.96, 117,446.84 and 33,920.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,285.96 : 117,446.84 = 33,920.10 : x
2. Step 2: Convert to fraction form
   78,285.96/117,446.84 = 33,920.10/x
3. Step 3: Cross multiply
   78,285.96x = 117,446.84 × 33,920.10
4. Step 4: Simplify right side
   78,285.96x = 3,983,808,055.05
5. Step 5: Solve for x
   x = 3,983,808,055.05/78,285.96
6. Step 6: Final answer
   x = 50,887.90