Finding the Fourth Proportional to 111,397.74, 165,939.06 and 105,361.62

Step by Step Solution

1. Step 1: Write the proportion equation
   111,397.74 : 165,939.06 = 105,361.62 : x
2. Step 2: Convert to fraction form
   111,397.74/165,939.06 = 105,361.62/x
3. Step 3: Cross multiply
   111,397.74x = 165,939.06 × 105,361.62
4. Step 4: Simplify right side
   111,397.74x = 17,483,608,182.88
5. Step 5: Solve for x
   x = 17,483,608,182.88/111,397.74
6. Step 6: Final answer
   x = 156,947.60