Finding the Fourth Proportional to 42,883.38, 64,282.50 and 20,354.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,883.38 : 64,282.50 = 20,354.58 : x
2. Step 2: Convert to fraction form
   42,883.38/64,282.50 = 20,354.58/x
3. Step 3: Cross multiply
   42,883.38x = 64,282.50 × 20,354.58
4. Step 4: Simplify right side
   42,883.38x = 1,308,443,288.85
5. Step 5: Solve for x
   x = 1,308,443,288.85/42,883.38
6. Step 6: Final answer
   x = 30,511.66