Finding the Fourth Proportional to 1,100.94, 1,651.42 and 279.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.94 : 1,651.42 = 279.21 : x
2. Step 2: Convert to fraction form
   1,100.94/1,651.42 = 279.21/x
3. Step 3: Cross multiply
   1,100.94x = 1,651.42 × 279.21
4. Step 4: Simplify right side
   1,100.94x = 461,095.71
5. Step 5: Solve for x
   x = 461,095.71/1,100.94
6. Step 6: Final answer
   x = 418.82