Finding the Fourth Proportional to 1,674.42, 2,310.93 and 1,086.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,674.42 : 2,310.93 = 1,086.21 : x
2. Step 2: Convert to fraction form
   1,674.42/2,310.93 = 1,086.21/x
3. Step 3: Cross multiply
   1,674.42x = 2,310.93 × 1,086.21
4. Step 4: Simplify right side
   1,674.42x = 2,510,155.28
5. Step 5: Solve for x
   x = 2,510,155.28/1,674.42
6. Step 6: Final answer
   x = 1,499.12