Finding the Fourth Proportional to 105,012.27, 144,918.18 and 57,265.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,012.27 : 144,918.18 = 57,265.20 : x
2. Step 2: Convert to fraction form
   105,012.27/144,918.18 = 57,265.20/x
3. Step 3: Cross multiply
   105,012.27x = 144,918.18 × 57,265.20
4. Step 4: Simplify right side
   105,012.27x = 8,298,768,561.34
5. Step 5: Solve for x
   x = 8,298,768,561.34/105,012.27
6. Step 6: Final answer
   x = 79,026.66