Finding the Fourth Proportional to 23,090.91, 31,861.41 and 13,656.03

Step by Step Solution

1. Step 1: Write the proportion equation
   23,090.91 : 31,861.41 = 13,656.03 : x
2. Step 2: Convert to fraction form
   23,090.91/31,861.41 = 13,656.03/x
3. Step 3: Cross multiply
   23,090.91x = 31,861.41 × 13,656.03
4. Step 4: Simplify right side
   23,090.91x = 435,100,370.80
5. Step 5: Solve for x
   x = 435,100,370.80/23,090.91
6. Step 6: Final answer
   x = 18,842.93