Finding the Fourth Proportional to 83,653.82, 115,391.56 and 49,639.90

Step by Step Solution

1. Step 1: Write the proportion equation
   83,653.82 : 115,391.56 = 49,639.90 : x
2. Step 2: Convert to fraction form
   83,653.82/115,391.56 = 49,639.90/x
3. Step 3: Cross multiply
   83,653.82x = 115,391.56 × 49,639.90
4. Step 4: Simplify right side
   83,653.82x = 5,728,024,798.19
5. Step 5: Solve for x
   x = 5,728,024,798.19/83,653.82
6. Step 6: Final answer
   x = 68,472.96