Finding the Fourth Proportional to 116,221.18, 160,387.95 and 65,920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   116,221.18 : 160,387.95 = 65,920.18 : x
2. Step 2: Convert to fraction form
   116,221.18/160,387.95 = 65,920.18/x
3. Step 3: Cross multiply
   116,221.18x = 160,387.95 × 65,920.18
4. Step 4: Simplify right side
   116,221.18x = 10,572,802,533.83
5. Step 5: Solve for x
   x = 10,572,802,533.83/116,221.18
6. Step 6: Final answer
   x = 90,971.39