Finding the Fourth Proportional to 23,025.64, 31,776.10 and 13,090.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,025.64 : 31,776.10 = 13,090.28 : x
2. Step 2: Convert to fraction form
   23,025.64/31,776.10 = 13,090.28/x
3. Step 3: Cross multiply
   23,025.64x = 31,776.10 × 13,090.28
4. Step 4: Simplify right side
   23,025.64x = 415,958,046.31
5. Step 5: Solve for x
   x = 415,958,046.31/23,025.64
6. Step 6: Final answer
   x = 18,064.99