Finding the Fourth Proportional to 81,540, 112,537.50 and 49,727.35

Step by Step Solution

1. Step 1: Write the proportion equation
   81,540 : 112,537.50 = 49,727.35 : x
2. Step 2: Convert to fraction form
   81,540/112,537.50 = 49,727.35/x
3. Step 3: Cross multiply
   81,540x = 112,537.50 × 49,727.35
4. Step 4: Simplify right side
   81,540x = 5,596,191,650.63
5. Step 5: Solve for x
   x = 5,596,191,650.63/81,540
6. Step 6: Final answer
   x = 68,631.24