Finding the Fourth Proportional to 111,976.40, 161,743.68 and 111,976.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,976.40 : 161,743.68 = 111,976.40 : x
2. Step 2: Convert to fraction form
   111,976.40/161,743.68 = 111,976.40/x
3. Step 3: Cross multiply
   111,976.40x = 161,743.68 × 111,976.40
4. Step 4: Simplify right side
   111,976.40x = 18,111,475,009.15
5. Step 5: Solve for x
   x = 18,111,475,009.15/111,976.40
6. Step 6: Final answer
   x = 161,743.68