Finding the Fourth Proportional to 35,760.06, 53,640.15 and 12,386.52

Step by Step Solution

1. Step 1: Write the proportion equation
   35,760.06 : 53,640.15 = 12,386.52 : x
2. Step 2: Convert to fraction form
   35,760.06/53,640.15 = 12,386.52/x
3. Step 3: Cross multiply
   35,760.06x = 53,640.15 × 12,386.52
4. Step 4: Simplify right side
   35,760.06x = 664,414,790.78
5. Step 5: Solve for x
   x = 664,414,790.78/35,760.06
6. Step 6: Final answer
   x = 18,579.80