Finding the Fourth Proportional to 105,716.62, 158,263.89 and 70,569.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,716.62 : 158,263.89 = 70,569.10 : x
2. Step 2: Convert to fraction form
   105,716.62/158,263.89 = 70,569.10/x
3. Step 3: Cross multiply
   105,716.62x = 158,263.89 × 70,569.10
4. Step 4: Simplify right side
   105,716.62x = 11,168,540,279.80
5. Step 5: Solve for x
   x = 11,168,540,279.80/105,716.62
6. Step 6: Final answer
   x = 105,646.02