Finding the Fourth Proportional to 116,960.42, 161,405.18 and 65,972.99

Step by Step Solution

1. Step 1: Write the proportion equation
   116,960.42 : 161,405.18 = 65,972.99 : x
2. Step 2: Convert to fraction form
   116,960.42/161,405.18 = 65,972.99/x
3. Step 3: Cross multiply
   116,960.42x = 161,405.18 × 65,972.99
4. Step 4: Simplify right side
   116,960.42x = 10,648,381,189.20
5. Step 5: Solve for x
   x = 10,648,381,189.20/116,960.42
6. Step 6: Final answer
   x = 91,042.61