Finding the Fourth Proportional to 107,697.39, 161,639.43 and 107,448.31

Step by Step Solution

1. Step 1: Write the proportion equation
   107,697.39 : 161,639.43 = 107,448.31 : x
2. Step 2: Convert to fraction form
   107,697.39/161,639.43 = 107,448.31/x
3. Step 3: Cross multiply
   107,697.39x = 161,639.43 × 107,448.31
4. Step 4: Simplify right side
   107,697.39x = 17,367,883,582.86
5. Step 5: Solve for x
   x = 17,367,883,582.86/107,697.39
6. Step 6: Final answer
   x = 161,265.59