Finding the Fourth Proportional to 90,383.64, 135,485.73 and 42,915.30

Step by Step Solution

1. Step 1: Write the proportion equation
   90,383.64 : 135,485.73 = 42,915.30 : x
2. Step 2: Convert to fraction form
   90,383.64/135,485.73 = 42,915.30/x
3. Step 3: Cross multiply
   90,383.64x = 135,485.73 × 42,915.30
4. Step 4: Simplify right side
   90,383.64x = 5,814,410,748.67
5. Step 5: Solve for x
   x = 5,814,410,748.67/90,383.64
6. Step 6: Final answer
   x = 64,330.35