Finding the Fourth Proportional to 90,359.09, 135,354.56 and 42,830.12

Step by Step Solution

1. Step 1: Write the proportion equation
   90,359.09 : 135,354.56 = 42,830.12 : x
2. Step 2: Convert to fraction form
   90,359.09/135,354.56 = 42,830.12/x
3. Step 3: Cross multiply
   90,359.09x = 135,354.56 × 42,830.12
4. Step 4: Simplify right side
   90,359.09x = 5,797,251,156.42
5. Step 5: Solve for x
   x = 5,797,251,156.42/90,359.09
6. Step 6: Final answer
   x = 64,157.92