Finding the Fourth Proportional to 105,681.27, 158,438.53 and 52,391.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,681.27 : 158,438.53 = 52,391.60 : x
2. Step 2: Convert to fraction form
   105,681.27/158,438.53 = 52,391.60/x
3. Step 3: Cross multiply
   105,681.27x = 158,438.53 × 52,391.60
4. Step 4: Simplify right side
   105,681.27x = 8,300,847,165.18
5. Step 5: Solve for x
   x = 8,300,847,165.18/105,681.27
6. Step 6: Final answer
   x = 78,546.06