Finding the Fourth Proportional to 1,932.21, 2,666.39 and 1,186.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,932.21 : 2,666.39 = 1,186.20 : x
2. Step 2: Convert to fraction form
   1,932.21/2,666.39 = 1,186.20/x
3. Step 3: Cross multiply
   1,932.21x = 2,666.39 × 1,186.20
4. Step 4: Simplify right side
   1,932.21x = 3,162,865.89
5. Step 5: Solve for x
   x = 3,162,865.89/1,932.21
6. Step 6: Final answer
   x = 1,636.92