Finding the Fourth Proportional to 90,019.62, 135,029.39 and 30,855.78

Step by Step Solution

1. Step 1: Write the proportion equation
   90,019.62 : 135,029.39 = 30,855.78 : x
2. Step 2: Convert to fraction form
   90,019.62/135,029.39 = 30,855.78/x
3. Step 3: Cross multiply
   90,019.62x = 135,029.39 × 30,855.78
4. Step 4: Simplify right side
   90,019.62x = 4,166,436,997.10
5. Step 5: Solve for x
   x = 4,166,436,997.10/90,019.62
6. Step 6: Final answer
   x = 46,283.65