Finding the Fourth Proportional to 23,825.56, 35,749.32 and 12,139.60

Step by Step Solution

1. Step 1: Write the proportion equation
   23,825.56 : 35,749.32 = 12,139.60 : x
2. Step 2: Convert to fraction form
   23,825.56/35,749.32 = 12,139.60/x
3. Step 3: Cross multiply
   23,825.56x = 35,749.32 × 12,139.60
4. Step 4: Simplify right side
   23,825.56x = 433,982,445.07
5. Step 5: Solve for x
   x = 433,982,445.07/23,825.56
6. Step 6: Final answer
   x = 18,214.99