Finding the Third Proportional to 12,158 and 17,385.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,158 : 17,385.75 = 17,385.75 : x
2. Step 2: Convert to fraction form
   12,158/17,385.75 = 17,385.75/x
3. Step 3: Cross multiply
   12,158x = 17,385.75 × 17,385.75
4. Step 4: Simplify right side
   12,158x = 302,264,303.06
5. Step 5: Solve for x
   x = 302,264,303.06/12,158
6. Step 6: Final answer
   x = 24,861.35