Finding the Fourth Proportional to 111,455.69, 166,973.33 and 86,373.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111,455.69 : 166,973.33 = 86,373.12 : x
2. Step 2: Convert to fraction form
   111,455.69/166,973.33 = 86,373.12/x
3. Step 3: Cross multiply
   111,455.69x = 166,973.33 × 86,373.12
4. Step 4: Simplify right side
   111,455.69x = 14,422,007,037.02
5. Step 5: Solve for x
   x = 14,422,007,037.02/111,455.69
6. Step 6: Final answer
   x = 129,396.78