Finding the Fourth Proportional to 111,933.92, 154,479.70 and 83,590.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,933.92 : 154,479.70 = 83,590.40 : x
2. Step 2: Convert to fraction form
   111,933.92/154,479.70 = 83,590.40/x
3. Step 3: Cross multiply
   111,933.92x = 154,479.70 × 83,590.40
4. Step 4: Simplify right side
   111,933.92x = 12,913,019,914.88
5. Step 5: Solve for x
   x = 12,913,019,914.88/111,933.92
6. Step 6: Final answer
   x = 115,362.88