Finding the Fourth Proportional to 105,034.47, 144,947.48 and 57,287.67

Step by Step Solution

1. Step 1: Write the proportion equation
   105,034.47 : 144,947.48 = 57,287.67 : x
2. Step 2: Convert to fraction form
   105,034.47/144,947.48 = 57,287.67/x
3. Step 3: Cross multiply
   105,034.47x = 144,947.48 × 57,287.67
4. Step 4: Simplify right side
   105,034.47x = 8,303,703,401.57
5. Step 5: Solve for x
   x = 8,303,703,401.57/105,034.47
6. Step 6: Final answer
   x = 79,056.94