Finding the Fourth Proportional to 90,388.10, 135,405.68 and 42,935.67

Step by Step Solution

1. Step 1: Write the proportion equation
   90,388.10 : 135,405.68 = 42,935.67 : x
2. Step 2: Convert to fraction form
   90,388.10/135,405.68 = 42,935.67/x
3. Step 3: Cross multiply
   90,388.10x = 135,405.68 × 42,935.67
4. Step 4: Simplify right side
   90,388.10x = 5,813,733,377.93
5. Step 5: Solve for x
   x = 5,813,733,377.93/90,388.10
6. Step 6: Final answer
   x = 64,319.68