Finding the Fourth Proportional to 105,674.58, 158,465.79 and 39,964.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,674.58 : 158,465.79 = 39,964.50 : x
2. Step 2: Convert to fraction form
   105,674.58/158,465.79 = 39,964.50/x
3. Step 3: Cross multiply
   105,674.58x = 158,465.79 × 39,964.50
4. Step 4: Simplify right side
   105,674.58x = 6,333,006,064.46
5. Step 5: Solve for x
   x = 6,333,006,064.46/105,674.58
6. Step 6: Final answer
   x = 59,929.32