Finding the Fourth Proportional to 23,181.59, 31,991.94 and 13,110.99

Step by Step Solution

1. Step 1: Write the proportion equation
   23,181.59 : 31,991.94 = 13,110.99 : x
2. Step 2: Convert to fraction form
   23,181.59/31,991.94 = 13,110.99/x
3. Step 3: Cross multiply
   23,181.59x = 31,991.94 × 13,110.99
4. Step 4: Simplify right side
   23,181.59x = 419,445,938.55
5. Step 5: Solve for x
   x = 419,445,938.55/23,181.59
6. Step 6: Final answer
   x = 18,093.92