Finding the Fourth Proportional to 105,687.57, 158,551.38 and 55,720.43

Step by Step Solution

1. Step 1: Write the proportion equation
   105,687.57 : 158,551.38 = 55,720.43 : x
2. Step 2: Convert to fraction form
   105,687.57/158,551.38 = 55,720.43/x
3. Step 3: Cross multiply
   105,687.57x = 158,551.38 × 55,720.43
4. Step 4: Simplify right side
   105,687.57x = 8,834,550,277.94
5. Step 5: Solve for x
   x = 8,834,550,277.94/105,687.57
6. Step 6: Final answer
   x = 83,591.20