Finding the Fourth Proportional to 1,410.12, 2,113.56 and 716.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.12 : 2,113.56 = 716.40 : x
2. Step 2: Convert to fraction form
   1,410.12/2,113.56 = 716.40/x
3. Step 3: Cross multiply
   1,410.12x = 2,113.56 × 716.40
4. Step 4: Simplify right side
   1,410.12x = 1,514,154.38
5. Step 5: Solve for x
   x = 1,514,154.38/1,410.12
6. Step 6: Final answer
   x = 1,073.78