Finding the Fourth Proportional to 116,399.68, 160,619.58 and 65,404.30

Step by Step Solution

1. Step 1: Write the proportion equation
   116,399.68 : 160,619.58 = 65,404.30 : x
2. Step 2: Convert to fraction form
   116,399.68/160,619.58 = 65,404.30/x
3. Step 3: Cross multiply
   116,399.68x = 160,619.58 × 65,404.30
4. Step 4: Simplify right side
   116,399.68x = 10,505,211,196.19
5. Step 5: Solve for x
   x = 10,505,211,196.19/116,399.68
6. Step 6: Final answer
   x = 90,251.20