Finding the Fourth Proportional to 23,179.18, 31,985.92 and 13,109.74

Step by Step Solution

1. Step 1: Write the proportion equation
   23,179.18 : 31,985.92 = 13,109.74 : x
2. Step 2: Convert to fraction form
   23,179.18/31,985.92 = 13,109.74/x
3. Step 3: Cross multiply
   23,179.18x = 31,985.92 × 13,109.74
4. Step 4: Simplify right side
   23,179.18x = 419,327,094.86
5. Step 5: Solve for x
   x = 419,327,094.86/23,179.18
6. Step 6: Final answer
   x = 18,090.68