Finding the Fourth Proportional to 105,814.91, 158,720.63 and 42,633.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,814.91 : 158,720.63 = 42,633.50 : x
2. Step 2: Convert to fraction form
   105,814.91/158,720.63 = 42,633.50/x
3. Step 3: Cross multiply
   105,814.91x = 158,720.63 × 42,633.50
4. Step 4: Simplify right side
   105,814.91x = 6,766,814,972.33
5. Step 5: Solve for x
   x = 6,766,814,972.33/105,814.91
6. Step 6: Final answer
   x = 63,949.54