Finding the Fourth Proportional to 116,803.89, 161,186.01 and 65,815.69

Step by Step Solution

1. Step 1: Write the proportion equation
   116,803.89 : 161,186.01 = 65,815.69 : x
2. Step 2: Convert to fraction form
   116,803.89/161,186.01 = 65,815.69/x
3. Step 3: Cross multiply
   116,803.89x = 161,186.01 × 65,815.69
4. Step 4: Simplify right side
   116,803.89x = 10,608,568,466.50
5. Step 5: Solve for x
   x = 10,608,568,466.50/116,803.89
6. Step 6: Final answer
   x = 90,823.76