Finding the Fourth Proportional to 42,752.26, 64,141.35 and 20,559.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,752.26 : 64,141.35 = 20,559.34 : x
2. Step 2: Convert to fraction form
   42,752.26/64,141.35 = 20,559.34/x
3. Step 3: Cross multiply
   42,752.26x = 64,141.35 × 20,559.34
4. Step 4: Simplify right side
   42,752.26x = 1,318,703,822.71
5. Step 5: Solve for x
   x = 1,318,703,822.71/42,752.26
6. Step 6: Final answer
   x = 30,845.24