Finding the Fourth Proportional to 1,406.35, 2,108.98 and 712.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.35 : 2,108.98 = 712.18 : x
2. Step 2: Convert to fraction form
   1,406.35/2,108.98 = 712.18/x
3. Step 3: Cross multiply
   1,406.35x = 2,108.98 × 712.18
4. Step 4: Simplify right side
   1,406.35x = 1,501,973.38
5. Step 5: Solve for x
   x = 1,501,973.38/1,406.35
6. Step 6: Final answer
   x = 1,067.99