Finding the Fourth Proportional to 117,123.05, 161,626.83 and 65,440.56

Step by Step Solution

1. Step 1: Write the proportion equation
   117,123.05 : 161,626.83 = 65,440.56 : x
2. Step 2: Convert to fraction form
   117,123.05/161,626.83 = 65,440.56/x
3. Step 3: Cross multiply
   117,123.05x = 161,626.83 × 65,440.56
4. Step 4: Simplify right side
   117,123.05x = 10,576,950,266.22
5. Step 5: Solve for x
   x = 10,576,950,266.22/117,123.05
6. Step 6: Final answer
   x = 90,306.31