Finding the Fourth Proportional to 1,103.67, 1,514.93 and 1,056.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.67 : 1,514.93 = 1,056.15 : x
2. Step 2: Convert to fraction form
   1,103.67/1,514.93 = 1,056.15/x
3. Step 3: Cross multiply
   1,103.67x = 1,514.93 × 1,056.15
4. Step 4: Simplify right side
   1,103.67x = 1,599,988.04
5. Step 5: Solve for x
   x = 1,599,988.04/1,103.67
6. Step 6: Final answer
   x = 1,449.70