Finding the Fourth Proportional to 35,746.47, 53,634.42 and 12,389.31

Step by Step Solution

1. Step 1: Write the proportion equation
   35,746.47 : 53,634.42 = 12,389.31 : x
2. Step 2: Convert to fraction form
   35,746.47/53,634.42 = 12,389.31/x
3. Step 3: Cross multiply
   35,746.47x = 53,634.42 × 12,389.31
4. Step 4: Simplify right side
   35,746.47x = 664,493,456.05
5. Step 5: Solve for x
   x = 664,493,456.05/35,746.47
6. Step 6: Final answer
   x = 18,589.07