Finding the Fourth Proportional to 42,947.26, 64,367.87 and 31,141.55

Step by Step Solution

1. Step 1: Write the proportion equation
   42,947.26 : 64,367.87 = 31,141.55 : x
2. Step 2: Convert to fraction form
   42,947.26/64,367.87 = 31,141.55/x
3. Step 3: Cross multiply
   42,947.26x = 64,367.87 × 31,141.55
4. Step 4: Simplify right side
   42,947.26x = 2,004,515,247.21
5. Step 5: Solve for x
   x = 2,004,515,247.21/42,947.26
6. Step 6: Final answer
   x = 46,673.88