Finding the Fourth Proportional to 1,401.39, 2,102.31 and 670.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.39 : 2,102.31 = 670.95 : x
2. Step 2: Convert to fraction form
   1,401.39/2,102.31 = 670.95/x
3. Step 3: Cross multiply
   1,401.39x = 2,102.31 × 670.95
4. Step 4: Simplify right side
   1,401.39x = 1,410,544.89
5. Step 5: Solve for x
   x = 1,410,544.89/1,401.39
6. Step 6: Final answer
   x = 1,006.53