Finding the Fourth Proportional to 116,513.20, 160,786.68 and 65,525.91

Step by Step Solution

1. Step 1: Write the proportion equation
   116,513.20 : 160,786.68 = 65,525.91 : x
2. Step 2: Convert to fraction form
   116,513.20/160,786.68 = 65,525.91/x
3. Step 3: Cross multiply
   116,513.20x = 160,786.68 × 65,525.91
4. Step 4: Simplify right side
   116,513.20x = 10,535,693,522.88
5. Step 5: Solve for x
   x = 10,535,693,522.88/116,513.20
6. Step 6: Final answer
   x = 90,424.89