Finding the Fourth Proportional to 116,908.50, 161,349.54 and 65,931.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,908.50 : 161,349.54 = 65,931.72 : x
2. Step 2: Convert to fraction form
   116,908.50/161,349.54 = 65,931.72/x
3. Step 3: Cross multiply
   116,908.50x = 161,349.54 × 65,931.72
4. Step 4: Simplify right side
   116,908.50x = 10,638,052,693.41
5. Step 5: Solve for x
   x = 10,638,052,693.41/116,908.50
6. Step 6: Final answer
   x = 90,994.69