Finding the Fourth Proportional to 111,321.98, 166,588.80 and 69,221.89

Step by Step Solution

1. Step 1: Write the proportion equation
   111,321.98 : 166,588.80 = 69,221.89 : x
2. Step 2: Convert to fraction form
   111,321.98/166,588.80 = 69,221.89/x
3. Step 3: Cross multiply
   111,321.98x = 166,588.80 × 69,221.89
4. Step 4: Simplify right side
   111,321.98x = 11,531,592,369.00
5. Step 5: Solve for x
   x = 11,531,592,369.00/111,321.98
6. Step 6: Final answer
   x = 103,587.74