Finding the Fourth Proportional to 42,922.29, 64,382.04 and 12,936.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,922.29 : 64,382.04 = 12,936.69 : x
2. Step 2: Convert to fraction form
   42,922.29/64,382.04 = 12,936.69/x
3. Step 3: Cross multiply
   42,922.29x = 64,382.04 × 12,936.69
4. Step 4: Simplify right side
   42,922.29x = 832,890,493.05
5. Step 5: Solve for x
   x = 832,890,493.05/42,922.29
6. Step 6: Final answer
   x = 19,404.61