Finding the Fourth Proportional to 105,024.84, 144,932.72 and 57,278.09

Step by Step Solution

1. Step 1: Write the proportion equation
   105,024.84 : 144,932.72 = 57,278.09 : x
2. Step 2: Convert to fraction form
   105,024.84/144,932.72 = 57,278.09/x
3. Step 3: Cross multiply
   105,024.84x = 144,932.72 × 57,278.09
4. Step 4: Simplify right side
   105,024.84x = 8,301,468,369.05
5. Step 5: Solve for x
   x = 8,301,468,369.05/105,024.84
6. Step 6: Final answer
   x = 79,042.90