Finding the Fourth Proportional to 90,200.82, 135,140.72 and 76,918.44

Step by Step Solution

1. Step 1: Write the proportion equation
   90,200.82 : 135,140.72 = 76,918.44 : x
2. Step 2: Convert to fraction form
   90,200.82/135,140.72 = 76,918.44/x
3. Step 3: Cross multiply
   90,200.82x = 135,140.72 × 76,918.44
4. Step 4: Simplify right side
   90,200.82x = 10,394,813,362.88
5. Step 5: Solve for x
   x = 10,394,813,362.88/90,200.82
6. Step 6: Final answer
   x = 115,240.79