Finding the Fourth Proportional to 105,009.72, 144,910.26 and 57,264

Step by Step Solution

1. Step 1: Write the proportion equation
   105,009.72 : 144,910.26 = 57,264 : x
2. Step 2: Convert to fraction form
   105,009.72/144,910.26 = 57,264/x
3. Step 3: Cross multiply
   105,009.72x = 144,910.26 × 57,264
4. Step 4: Simplify right side
   105,009.72x = 8,298,141,128.64
5. Step 5: Solve for x
   x = 8,298,141,128.64/105,009.72
6. Step 6: Final answer
   x = 79,022.60