Finding the Fourth Proportional to 42,934.11, 64,410.27 and 12,949.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,934.11 : 64,410.27 = 12,949.26 : x
2. Step 2: Convert to fraction form
   42,934.11/64,410.27 = 12,949.26/x
3. Step 3: Cross multiply
   42,934.11x = 64,410.27 × 12,949.26
4. Step 4: Simplify right side
   42,934.11x = 834,065,010.85
5. Step 5: Solve for x
   x = 834,065,010.85/42,934.11
6. Step 6: Final answer
   x = 19,426.63