Finding the Fourth Proportional to 105,043.20, 157,572.72 and 30,162.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,043.20 : 157,572.72 = 30,162.78 : x
2. Step 2: Convert to fraction form
   105,043.20/157,572.72 = 30,162.78/x
3. Step 3: Cross multiply
   105,043.20x = 157,572.72 × 30,162.78
4. Step 4: Simplify right side
   105,043.20x = 4,752,831,287.36
5. Step 5: Solve for x
   x = 4,752,831,287.36/105,043.20
6. Step 6: Final answer
   x = 45,246.44