Finding the Fourth Proportional to 23,162.64, 31,961.00 and 13,091.00

Step by Step Solution

1. Step 1: Write the proportion equation
   23,162.64 : 31,961.00 = 13,091.00 : x
2. Step 2: Convert to fraction form
   23,162.64/31,961.00 = 13,091.00/x
3. Step 3: Cross multiply
   23,162.64x = 31,961.00 × 13,091.00
4. Step 4: Simplify right side
   23,162.64x = 418,401,430.07
5. Step 5: Solve for x
   x = 418,401,430.07/23,162.64
6. Step 6: Final answer
   x = 18,063.63