Finding the Fourth Proportional to 105,915.68, 158,928.90 and 42,751.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105,915.68 : 158,928.90 = 42,751.52 : x
2. Step 2: Convert to fraction form
   105,915.68/158,928.90 = 42,751.52/x
3. Step 3: Cross multiply
   105,915.68x = 158,928.90 × 42,751.52
4. Step 4: Simplify right side
   105,915.68x = 6,794,452,046.93
5. Step 5: Solve for x
   x = 6,794,452,046.93/105,915.68
6. Step 6: Final answer
   x = 64,149.63