Finding the Fourth Proportional to 12,661.30, 17,764.70 and 12,661.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.30 : 17,764.70 = 12,661.30 : x
2. Step 2: Convert to fraction form
   12,661.30/17,764.70 = 12,661.30/x
3. Step 3: Cross multiply
   12,661.30x = 17,764.70 × 12,661.30
4. Step 4: Simplify right side
   12,661.30x = 224,924,196.11
5. Step 5: Solve for x
   x = 224,924,196.11/12,661.30
6. Step 6: Final answer
   x = 17,764.70