Finding the Fourth Proportional to 167,899.98, 231,694.42 and 91,417.15

Step by Step Solution

1. Step 1: Write the proportion equation
   167,899.98 : 231,694.42 = 91,417.15 : x
2. Step 2: Convert to fraction form
   167,899.98/231,694.42 = 91,417.15/x
3. Step 3: Cross multiply
   167,899.98x = 231,694.42 × 91,417.15
4. Step 4: Simplify right side
   167,899.98x = 21,180,843,547.30
5. Step 5: Solve for x
   x = 21,180,843,547.30/167,899.98
6. Step 6: Final answer
   x = 126,151.55