Finding the Fourth Proportional to 105,964.32, 158,927.31 and 42,781.80

Step by Step Solution

1. Step 1: Write the proportion equation
   105,964.32 : 158,927.31 = 42,781.80 : x
2. Step 2: Convert to fraction form
   105,964.32/158,927.31 = 42,781.80/x
3. Step 3: Cross multiply
   105,964.32x = 158,927.31 × 42,781.80
4. Step 4: Simplify right side
   105,964.32x = 6,799,196,390.96
5. Step 5: Solve for x
   x = 6,799,196,390.96/105,964.32
6. Step 6: Final answer
   x = 64,164.96