Finding the Fourth Proportional to 105,168.06, 145,132.42 and 57,422.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,168.06 : 145,132.42 = 57,422.48 : x
2. Step 2: Convert to fraction form
   105,168.06/145,132.42 = 57,422.48/x
3. Step 3: Cross multiply
   105,168.06x = 145,132.42 × 57,422.48
4. Step 4: Simplify right side
   105,168.06x = 8,333,863,484.80
5. Step 5: Solve for x
   x = 8,333,863,484.80/105,168.06
6. Step 6: Final answer
   x = 79,243.29