Finding the Fourth Proportional to 12,661.00, 18,943.31 and 7,644.91

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.00 : 18,943.31 = 7,644.91 : x
2. Step 2: Convert to fraction form
   12,661.00/18,943.31 = 7,644.91/x
3. Step 3: Cross multiply
   12,661.00x = 18,943.31 × 7,644.91
4. Step 4: Simplify right side
   12,661.00x = 144,819,833.58
5. Step 5: Solve for x
   x = 144,819,833.58/12,661.00
6. Step 6: Final answer
   x = 11,438.26