Finding the Fourth Proportional to 116,853, 161,253.72 and 65,868.72

Step by Step Solution

1. Step 1: Write the proportion equation
   116,853 : 161,253.72 = 65,868.72 : x
2. Step 2: Convert to fraction form
   116,853/161,253.72 = 65,868.72/x
3. Step 3: Cross multiply
   116,853x = 161,253.72 × 65,868.72
4. Step 4: Simplify right side
   116,853x = 10,621,576,131.64
5. Step 5: Solve for x
   x = 10,621,576,131.64/116,853
6. Step 6: Final answer
   x = 90,896.91