Finding the Fourth Proportional to 1,100.82, 1,651.41 and 407.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.82 : 1,651.41 = 407.49 : x
2. Step 2: Convert to fraction form
   1,100.82/1,651.41 = 407.49/x
3. Step 3: Cross multiply
   1,100.82x = 1,651.41 × 407.49
4. Step 4: Simplify right side
   1,100.82x = 672,933.06
5. Step 5: Solve for x
   x = 672,933.06/1,100.82
6. Step 6: Final answer
   x = 611.30