Finding the Fourth Proportional to 43,270.20, 64,898.55 and 13,695.30

Step by Step Solution

1. Step 1: Write the proportion equation
   43,270.20 : 64,898.55 = 13,695.30 : x
2. Step 2: Convert to fraction form
   43,270.20/64,898.55 = 13,695.30/x
3. Step 3: Cross multiply
   43,270.20x = 64,898.55 × 13,695.30
4. Step 4: Simplify right side
   43,270.20x = 888,805,111.82
5. Step 5: Solve for x
   x = 888,805,111.82/43,270.20
6. Step 6: Final answer
   x = 20,540.81