Finding the Fourth Proportional to 98,766.06, 136,297.56 and 91,231.62

Step by Step Solution

1. Step 1: Write the proportion equation
   98,766.06 : 136,297.56 = 91,231.62 : x
2. Step 2: Convert to fraction form
   98,766.06/136,297.56 = 91,231.62/x
3. Step 3: Cross multiply
   98,766.06x = 136,297.56 × 91,231.62
4. Step 4: Simplify right side
   98,766.06x = 12,434,647,200.85
5. Step 5: Solve for x
   x = 12,434,647,200.85/98,766.06
6. Step 6: Final answer
   x = 125,900.00