Finding the Fourth Proportional to 17,748.10, 24,495.78 and 12,985.30

Step by Step Solution

1. Step 1: Write the proportion equation
   17,748.10 : 24,495.78 = 12,985.30 : x
2. Step 2: Convert to fraction form
   17,748.10/24,495.78 = 12,985.30/x
3. Step 3: Cross multiply
   17,748.10x = 24,495.78 × 12,985.30
4. Step 4: Simplify right side
   17,748.10x = 318,085,052.03
5. Step 5: Solve for x
   x = 318,085,052.03/17,748.10
6. Step 6: Final answer
   x = 17,922.20