Finding the Fourth Proportional to 105,754.47, 145,938.54 and 60,429.57

Step by Step Solution

1. Step 1: Write the proportion equation
   105,754.47 : 145,938.54 = 60,429.57 : x
2. Step 2: Convert to fraction form
   105,754.47/145,938.54 = 60,429.57/x
3. Step 3: Cross multiply
   105,754.47x = 145,938.54 × 60,429.57
4. Step 4: Simplify right side
   105,754.47x = 8,819,003,218.63
5. Step 5: Solve for x
   x = 8,819,003,218.63/105,754.47
6. Step 6: Final answer
   x = 83,391.30