Finding the Fourth Proportional to 111,917.10, 154,456.76 and 83,573.58

Step by Step Solution

1. Step 1: Write the proportion equation
   111,917.10 : 154,456.76 = 83,573.58 : x
2. Step 2: Convert to fraction form
   111,917.10/154,456.76 = 83,573.58/x
3. Step 3: Cross multiply
   111,917.10x = 154,456.76 × 83,573.58
4. Step 4: Simplify right side
   111,917.10x = 12,908,504,388.40
5. Step 5: Solve for x
   x = 12,908,504,388.40/111,917.10
6. Step 6: Final answer
   x = 115,339.88