Finding the Fourth Proportional to 17,970.57, 26,942.31 and 12,408.03

Step by Step Solution

1. Step 1: Write the proportion equation
   17,970.57 : 26,942.31 = 12,408.03 : x
2. Step 2: Convert to fraction form
   17,970.57/26,942.31 = 12,408.03/x
3. Step 3: Cross multiply
   17,970.57x = 26,942.31 × 12,408.03
4. Step 4: Simplify right side
   17,970.57x = 334,300,990.75
5. Step 5: Solve for x
   x = 334,300,990.75/17,970.57
6. Step 6: Final answer
   x = 18,602.69