Finding the Fourth Proportional to 83,993.18, 115,857.42 and 49,978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   83,993.18 : 115,857.42 = 49,978.04 : x
2. Step 2: Convert to fraction form
   83,993.18/115,857.42 = 49,978.04/x
3. Step 3: Cross multiply
   83,993.18x = 115,857.42 × 49,978.04
4. Step 4: Simplify right side
   83,993.18x = 5,790,326,771.06
5. Step 5: Solve for x
   x = 5,790,326,771.06/83,993.18
6. Step 6: Final answer
   x = 68,938.06