Finding the Fourth Proportional to 105,962.32, 158,924.31 and 42,779.80

Step by Step Solution

1. Step 1: Write the proportion equation
   105,962.32 : 158,924.31 = 42,779.80 : x
2. Step 2: Convert to fraction form
   105,962.32/158,924.31 = 42,779.80/x
3. Step 3: Cross multiply
   105,962.32x = 158,924.31 × 42,779.80
4. Step 4: Simplify right side
   105,962.32x = 6,798,750,196.94
5. Step 5: Solve for x
   x = 6,798,750,196.94/105,962.32
6. Step 6: Final answer
   x = 64,161.96