Finding the Fourth Proportional to 116,298.72, 160,491.78 and 65,304.36

Step by Step Solution

1. Step 1: Write the proportion equation
   116,298.72 : 160,491.78 = 65,304.36 : x
2. Step 2: Convert to fraction form
   116,298.72/160,491.78 = 65,304.36/x
3. Step 3: Cross multiply
   116,298.72x = 160,491.78 × 65,304.36
4. Step 4: Simplify right side
   116,298.72x = 10,480,812,978.16
5. Step 5: Solve for x
   x = 10,480,812,978.16/116,298.72
6. Step 6: Final answer
   x = 90,119.76