Finding the Fourth Proportional to 105,478.42, 158,327.01 and 70,661.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105,478.42 : 158,327.01 = 70,661.38 : x
2. Step 2: Convert to fraction form
   105,478.42/158,327.01 = 70,661.38/x
3. Step 3: Cross multiply
   105,478.42x = 158,327.01 × 70,661.38
4. Step 4: Simplify right side
   105,478.42x = 11,187,605,017.87
5. Step 5: Solve for x
   x = 11,187,605,017.87/105,478.42
6. Step 6: Final answer
   x = 106,065.35