Finding the Fourth Proportional to 69,559.32, 104,105.70 and 57,078.84

Step by Step Solution

1. Step 1: Write the proportion equation
   69,559.32 : 104,105.70 = 57,078.84 : x
2. Step 2: Convert to fraction form
   69,559.32/104,105.70 = 57,078.84/x
3. Step 3: Cross multiply
   69,559.32x = 104,105.70 × 57,078.84
4. Step 4: Simplify right side
   69,559.32x = 5,942,232,593.39
5. Step 5: Solve for x
   x = 5,942,232,593.39/69,559.32
6. Step 6: Final answer
   x = 85,426.84