Finding the Fourth Proportional to 42,959.21, 64,485.95 and 34,131.27

Step by Step Solution

1. Step 1: Write the proportion equation
   42,959.21 : 64,485.95 = 34,131.27 : x
2. Step 2: Convert to fraction form
   42,959.21/64,485.95 = 34,131.27/x
3. Step 3: Cross multiply
   42,959.21x = 64,485.95 × 34,131.27
4. Step 4: Simplify right side
   42,959.21x = 2,200,987,537.82
5. Step 5: Solve for x
   x = 2,200,987,537.82/42,959.21
6. Step 6: Final answer
   x = 51,234.36