Finding the Fourth Proportional to 116,640.38, 160,962.72 and 66,339.38

Step by Step Solution

1. Step 1: Write the proportion equation
   116,640.38 : 160,962.72 = 66,339.38 : x
2. Step 2: Convert to fraction form
   116,640.38/160,962.72 = 66,339.38/x
3. Step 3: Cross multiply
   116,640.38x = 160,962.72 × 66,339.38
4. Step 4: Simplify right side
   116,640.38x = 10,678,167,047.91
5. Step 5: Solve for x
   x = 10,678,167,047.91/116,640.38
6. Step 6: Final answer
   x = 91,547.77