Finding the Fourth Proportional to 105,919.32, 158,843.70 and 42,723.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,919.32 : 158,843.70 = 42,723.12 : x
2. Step 2: Convert to fraction form
   105,919.32/158,843.70 = 42,723.12/x
3. Step 3: Cross multiply
   105,919.32x = 158,843.70 × 42,723.12
4. Step 4: Simplify right side
   105,919.32x = 6,786,298,456.34
5. Step 5: Solve for x
   x = 6,786,298,456.34/105,919.32
6. Step 6: Final answer
   x = 64,070.45