Finding the Fourth Proportional to 1,109.42, 1,519.90 and 1,067.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.42 : 1,519.90 = 1,067.88 : x
2. Step 2: Convert to fraction form
   1,109.42/1,519.90 = 1,067.88/x
3. Step 3: Cross multiply
   1,109.42x = 1,519.90 × 1,067.88
4. Step 4: Simplify right side
   1,109.42x = 1,623,070.81
5. Step 5: Solve for x
   x = 1,623,070.81/1,109.42
6. Step 6: Final answer
   x = 1,462.99