Finding the Fourth Proportional to 116,899.29, 161,317.78 and 65,911.57

Step by Step Solution

1. Step 1: Write the proportion equation
   116,899.29 : 161,317.78 = 65,911.57 : x
2. Step 2: Convert to fraction form
   116,899.29/161,317.78 = 65,911.57/x
3. Step 3: Cross multiply
   116,899.29x = 161,317.78 × 65,911.57
4. Step 4: Simplify right side
   116,899.29x = 10,632,707,580.64
5. Step 5: Solve for x
   x = 10,632,707,580.64/116,899.29
6. Step 6: Final answer
   x = 90,956.13