Finding the Fourth Proportional to 105,443.11, 145,510.87 and 57,044.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,443.11 : 145,510.87 = 57,044.88 : x
2. Step 2: Convert to fraction form
   105,443.11/145,510.87 = 57,044.88/x
3. Step 3: Cross multiply
   105,443.11x = 145,510.87 × 57,044.88
4. Step 4: Simplify right side
   105,443.11x = 8,300,649,490.41
5. Step 5: Solve for x
   x = 8,300,649,490.41/105,443.11
6. Step 6: Final answer
   x = 78,721.59