Finding the Fourth Proportional to 90,338.24, 135,435 and 42,929.54

Step by Step Solution

1. Step 1: Write the proportion equation
   90,338.24 : 135,435 = 42,929.54 : x
2. Step 2: Convert to fraction form
   90,338.24/135,435 = 42,929.54/x
3. Step 3: Cross multiply
   90,338.24x = 135,435 × 42,929.54
4. Step 4: Simplify right side
   90,338.24x = 5,814,162,249.90
5. Step 5: Solve for x
   x = 5,814,162,249.90/90,338.24
6. Step 6: Final answer
   x = 64,359.92