Finding the Fourth Proportional to 12,672.10, 17,770.10 and 12,672.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,672.10 : 17,770.10 = 12,672.10 : x
2. Step 2: Convert to fraction form
   12,672.10/17,770.10 = 12,672.10/x
3. Step 3: Cross multiply
   12,672.10x = 17,770.10 × 12,672.10
4. Step 4: Simplify right side
   12,672.10x = 225,184,484.21
5. Step 5: Solve for x
   x = 225,184,484.21/12,672.10
6. Step 6: Final answer
   x = 17,770.10