Finding the Fourth Proportional to 105,445.28, 158,167.98 and 43,115.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,445.28 : 158,167.98 = 43,115.78 : x
2. Step 2: Convert to fraction form
   105,445.28/158,167.98 = 43,115.78/x
3. Step 3: Cross multiply
   105,445.28x = 158,167.98 × 43,115.78
4. Step 4: Simplify right side
   105,445.28x = 6,819,535,037.88
5. Step 5: Solve for x
   x = 6,819,535,037.88/105,445.28
6. Step 6: Final answer
   x = 64,673.69