Finding the Fourth Proportional to 105,049.72, 157,620.78 and 55,118.04

Step by Step Solution

1. Step 1: Write the proportion equation
   105,049.72 : 157,620.78 = 55,118.04 : x
2. Step 2: Convert to fraction form
   105,049.72/157,620.78 = 55,118.04/x
3. Step 3: Cross multiply
   105,049.72x = 157,620.78 × 55,118.04
4. Step 4: Simplify right side
   105,049.72x = 8,687,748,456.87
5. Step 5: Solve for x
   x = 8,687,748,456.87/105,049.72
6. Step 6: Final answer
   x = 82,701.30