Finding the Fourth Proportional to 1,100.98, 1,651.29 and 407.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.98 : 1,651.29 = 407.98 : x
2. Step 2: Convert to fraction form
   1,100.98/1,651.29 = 407.98/x
3. Step 3: Cross multiply
   1,100.98x = 1,651.29 × 407.98
4. Step 4: Simplify right side
   1,100.98x = 673,693.29
5. Step 5: Solve for x
   x = 673,693.29/1,100.98
6. Step 6: Final answer
   x = 611.90