Finding the Fourth Proportional to 111,398.74, 165,940.55 and 105,362.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111,398.74 : 165,940.55 = 105,362.62 : x
2. Step 2: Convert to fraction form
   111,398.74/165,940.55 = 105,362.62/x
3. Step 3: Cross multiply
   111,398.74x = 165,940.55 × 105,362.62
4. Step 4: Simplify right side
   111,398.74x = 17,483,931,112.24
5. Step 5: Solve for x
   x = 17,483,931,112.24/111,398.74
6. Step 6: Final answer
   x = 156,949.09