Finding the Fourth Proportional to 111,023.69, 153,115.83 and 78,694.35

Step by Step Solution

1. Step 1: Write the proportion equation
   111,023.69 : 153,115.83 = 78,694.35 : x
2. Step 2: Convert to fraction form
   111,023.69/153,115.83 = 78,694.35/x
3. Step 3: Cross multiply
   111,023.69x = 153,115.83 × 78,694.35
4. Step 4: Simplify right side
   111,023.69x = 12,049,350,716.56
5. Step 5: Solve for x
   x = 12,049,350,716.56/111,023.69
6. Step 6: Final answer
   x = 108,529.55