Finding the Fourth Proportional to 1,368.96, 1,891.20 and 1,074.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.96 : 1,891.20 = 1,074.24 : x
2. Step 2: Convert to fraction form
   1,368.96/1,891.20 = 1,074.24/x
3. Step 3: Cross multiply
   1,368.96x = 1,891.20 × 1,074.24
4. Step 4: Simplify right side
   1,368.96x = 2,031,602.69
5. Step 5: Solve for x
   x = 2,031,602.69/1,368.96
6. Step 6: Final answer
   x = 1,484.05