Finding the Fourth Proportional to 1,407.24, 2,109.38 and 714.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.24 : 2,109.38 = 714.42 : x
2. Step 2: Convert to fraction form
   1,407.24/2,109.38 = 714.42/x
3. Step 3: Cross multiply
   1,407.24x = 2,109.38 × 714.42
4. Step 4: Simplify right side
   1,407.24x = 1,506,979.69
5. Step 5: Solve for x
   x = 1,506,979.69/1,407.24
6. Step 6: Final answer
   x = 1,070.88