Finding the Fourth Proportional to 42,889.72, 64,433.50 and 41,118.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,889.72 : 64,433.50 = 41,118.28 : x
2. Step 2: Convert to fraction form
   42,889.72/64,433.50 = 41,118.28/x
3. Step 3: Cross multiply
   42,889.72x = 64,433.50 × 41,118.28
4. Step 4: Simplify right side
   42,889.72x = 2,649,394,694.38
5. Step 5: Solve for x
   x = 2,649,394,694.38/42,889.72
6. Step 6: Final answer
   x = 61,772.25