Finding the Fourth Proportional to 105,994.58, 158,991.50 and 100,673.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,994.58 : 158,991.50 = 100,673.20 : x
2. Step 2: Convert to fraction form
   105,994.58/158,991.50 = 100,673.20/x
3. Step 3: Cross multiply
   105,994.58x = 158,991.50 × 100,673.20
4. Step 4: Simplify right side
   105,994.58x = 16,006,182,932.00
5. Step 5: Solve for x
   x = 16,006,182,932.00/105,994.58
6. Step 6: Final answer
   x = 151,009.44