Finding the Fourth Proportional to 167,857.50, 231,643.34 and 91,377.15

Step by Step Solution

1. Step 1: Write the proportion equation
   167,857.50 : 231,643.34 = 91,377.15 : x
2. Step 2: Convert to fraction form
   167,857.50/231,643.34 = 91,377.15/x
3. Step 3: Cross multiply
   167,857.50x = 231,643.34 × 91,377.15
4. Step 4: Simplify right side
   167,857.50x = 21,166,907,067.46
5. Step 5: Solve for x
   x = 21,166,907,067.46/167,857.50
6. Step 6: Final answer
   x = 126,100.46