Finding the Fourth Proportional to 116,000.71, 160,080.91 and 65,699.71

Step by Step Solution

1. Step 1: Write the proportion equation
   116,000.71 : 160,080.91 = 65,699.71 : x
2. Step 2: Convert to fraction form
   116,000.71/160,080.91 = 65,699.71/x
3. Step 3: Cross multiply
   116,000.71x = 160,080.91 × 65,699.71
4. Step 4: Simplify right side
   116,000.71x = 10,517,269,363.54
5. Step 5: Solve for x
   x = 10,517,269,363.54/116,000.71
6. Step 6: Final answer
   x = 90,665.56