Finding the Fourth Proportional to 42,892.30, 64,351.47 and 20,701.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,892.30 : 64,351.47 = 20,701.54 : x
2. Step 2: Convert to fraction form
   42,892.30/64,351.47 = 20,701.54/x
3. Step 3: Cross multiply
   42,892.30x = 64,351.47 × 20,701.54
4. Step 4: Simplify right side
   42,892.30x = 1,332,174,530.26
5. Step 5: Solve for x
   x = 1,332,174,530.26/42,892.30
6. Step 6: Final answer
   x = 31,058.59