Finding the Fourth Proportional to 1,407.02, 2,111.13 and 676.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.02 : 2,111.13 = 676.60 : x
2. Step 2: Convert to fraction form
   1,407.02/2,111.13 = 676.60/x
3. Step 3: Cross multiply
   1,407.02x = 2,111.13 × 676.60
4. Step 4: Simplify right side
   1,407.02x = 1,428,390.56
5. Step 5: Solve for x
   x = 1,428,390.56/1,407.02
6. Step 6: Final answer
   x = 1,015.19