Finding the Fourth Proportional to 1,401.18, 2,102.23 and 670.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.18 : 2,102.23 = 670.81 : x
2. Step 2: Convert to fraction form
   1,401.18/2,102.23 = 670.81/x
3. Step 3: Cross multiply
   1,401.18x = 2,102.23 × 670.81
4. Step 4: Simplify right side
   1,401.18x = 1,410,196.91
5. Step 5: Solve for x
   x = 1,410,196.91/1,401.18
6. Step 6: Final answer
   x = 1,006.44