Finding the Fourth Proportional to 42,761.52, 64,132.56 and 20,563.47

Step by Step Solution

1. Step 1: Write the proportion equation
   42,761.52 : 64,132.56 = 20,563.47 : x
2. Step 2: Convert to fraction form
   42,761.52/64,132.56 = 20,563.47/x
3. Step 3: Cross multiply
   42,761.52x = 64,132.56 × 20,563.47
4. Step 4: Simplify right side
   42,761.52x = 1,318,787,973.58
5. Step 5: Solve for x
   x = 1,318,787,973.58/42,761.52
6. Step 6: Final answer
   x = 30,840.53