Finding the Fourth Proportional to 42,854.48, 64,323.17 and 20,683.46

Step by Step Solution

1. Step 1: Write the proportion equation
   42,854.48 : 64,323.17 = 20,683.46 : x
2. Step 2: Convert to fraction form
   42,854.48/64,323.17 = 20,683.46/x
3. Step 3: Cross multiply
   42,854.48x = 64,323.17 × 20,683.46
4. Step 4: Simplify right side
   42,854.48x = 1,330,425,392.15
5. Step 5: Solve for x
   x = 1,330,425,392.15/42,854.48
6. Step 6: Final answer
   x = 31,045.19