Finding the Fourth Proportional to 105,105.74, 145,049.00 and 57,362.16

Step by Step Solution

1. Step 1: Write the proportion equation
   105,105.74 : 145,049.00 = 57,362.16 : x
2. Step 2: Convert to fraction form
   105,105.74/145,049.00 = 57,362.16/x
3. Step 3: Cross multiply
   105,105.74x = 145,049.00 × 57,362.16
4. Step 4: Simplify right side
   105,105.74x = 8,320,323,659.03
5. Step 5: Solve for x
   x = 8,320,323,659.03/105,105.74
6. Step 6: Final answer
   x = 79,161.46