Finding the Fourth Proportional to 42,951.78, 64,447.98 and 20,752.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,951.78 : 64,447.98 = 20,752.68 : x
2. Step 2: Convert to fraction form
   42,951.78/64,447.98 = 20,752.68/x
3. Step 3: Cross multiply
   42,951.78x = 64,447.98 × 20,752.68
4. Step 4: Simplify right side
   42,951.78x = 1,337,468,305.59
5. Step 5: Solve for x
   x = 1,337,468,305.59/42,951.78
6. Step 6: Final answer
   x = 31,138.83