Finding the Fourth Proportional to 42,854.72, 64,323.55 and 20,683.71

Step by Step Solution

1. Step 1: Write the proportion equation
   42,854.72 : 64,323.55 = 20,683.71 : x
2. Step 2: Convert to fraction form
   42,854.72/64,323.55 = 20,683.71/x
3. Step 3: Cross multiply
   42,854.72x = 64,323.55 × 20,683.71
4. Step 4: Simplify right side
   42,854.72x = 1,330,449,602.66
5. Step 5: Solve for x
   x = 1,330,449,602.66/42,854.72
6. Step 6: Final answer
   x = 31,045.58