Finding the Fourth Proportional to 83,986.11, 115,848.72 and 49,971.60

Step by Step Solution

1. Step 1: Write the proportion equation
   83,986.11 : 115,848.72 = 49,971.60 : x
2. Step 2: Convert to fraction form
   83,986.11/115,848.72 = 49,971.60/x
3. Step 3: Cross multiply
   83,986.11x = 115,848.72 × 49,971.60
4. Step 4: Simplify right side
   83,986.11x = 5,789,145,896.35
5. Step 5: Solve for x
   x = 5,789,145,896.35/83,986.11
6. Step 6: Final answer
   x = 68,929.80