Finding the Fourth Proportional to 111,323.30, 166,590.77 and 69,223.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,323.30 : 166,590.77 = 69,223.20 : x
2. Step 2: Convert to fraction form
   111,323.30/166,590.77 = 69,223.20/x
3. Step 3: Cross multiply
   111,323.30x = 166,590.77 × 69,223.20
4. Step 4: Simplify right side
   111,323.30x = 11,531,945,843.75
5. Step 5: Solve for x
   x = 11,531,945,843.75/111,323.30
6. Step 6: Final answer
   x = 103,589.69