Finding the Fourth Proportional to 81,696.78, 122,561.56 and 37,311.60

Step by Step Solution

1. Step 1: Write the proportion equation
   81,696.78 : 122,561.56 = 37,311.60 : x
2. Step 2: Convert to fraction form
   81,696.78/122,561.56 = 37,311.60/x
3. Step 3: Cross multiply
   81,696.78x = 122,561.56 × 37,311.60
4. Step 4: Simplify right side
   81,696.78x = 4,572,967,902.10
5. Step 5: Solve for x
   x = 4,572,967,902.10/81,696.78
6. Step 6: Final answer
   x = 55,974.89