Finding the Fourth Proportional to 66,198.82, 91,266.60 and 54,826.42

Step by Step Solution

1. Step 1: Write the proportion equation
   66,198.82 : 91,266.60 = 54,826.42 : x
2. Step 2: Convert to fraction form
   66,198.82/91,266.60 = 54,826.42/x
3. Step 3: Cross multiply
   66,198.82x = 91,266.60 × 54,826.42
4. Step 4: Simplify right side
   66,198.82x = 5,003,820,943.57
5. Step 5: Solve for x
   x = 5,003,820,943.57/66,198.82
6. Step 6: Final answer
   x = 75,587.77