Finding the Fourth Proportional to 14,485.86, 19,990.77 and 9,453.30

Step by Step Solution

1. Step 1: Write the proportion equation
   14,485.86 : 19,990.77 = 9,453.30 : x
2. Step 2: Convert to fraction form
   14,485.86/19,990.77 = 9,453.30/x
3. Step 3: Cross multiply
   14,485.86x = 19,990.77 × 9,453.30
4. Step 4: Simplify right side
   14,485.86x = 188,978,746.04
5. Step 5: Solve for x
   x = 188,978,746.04/14,485.86
6. Step 6: Final answer
   x = 13,045.74