Finding the Fourth Proportional to 17,739.60, 24,485.76 and 12,435.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,739.60 : 24,485.76 = 12,435.72 : x
2. Step 2: Convert to fraction form
   17,739.60/24,485.76 = 12,435.72/x
3. Step 3: Cross multiply
   17,739.60x = 24,485.76 × 12,435.72
4. Step 4: Simplify right side
   17,739.60x = 304,498,055.35
5. Step 5: Solve for x
   x = 304,498,055.35/17,739.60
6. Step 6: Final answer
   x = 17,164.88