Finding the Fourth Proportional to 6,443.72, 9,666.54 and 1,826.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,443.72 : 9,666.54 = 1,826.60 : x
2. Step 2: Convert to fraction form
   6,443.72/9,666.54 = 1,826.60/x
3. Step 3: Cross multiply
   6,443.72x = 9,666.54 × 1,826.60
4. Step 4: Simplify right side
   6,443.72x = 17,656,901.96
5. Step 5: Solve for x
   x = 17,656,901.96/6,443.72
6. Step 6: Final answer
   x = 2,740.17