Finding the Fourth Proportional to 105,003.20, 144,903.84 and 57,255.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105,003.20 : 144,903.84 = 57,255.53 : x
2. Step 2: Convert to fraction form
   105,003.20/144,903.84 = 57,255.53/x
3. Step 3: Cross multiply
   105,003.20x = 144,903.84 × 57,255.53
4. Step 4: Simplify right side
   105,003.20x = 8,296,545,219.01
5. Step 5: Solve for x
   x = 8,296,545,219.01/105,003.20
6. Step 6: Final answer
   x = 79,012.31