Finding the Fourth Proportional to 1,401.61, 2,100.27 and 670.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.61 : 2,100.27 = 670.18 : x
2. Step 2: Convert to fraction form
   1,401.61/2,100.27 = 670.18/x
3. Step 3: Cross multiply
   1,401.61x = 2,100.27 × 670.18
4. Step 4: Simplify right side
   1,401.61x = 1,407,548.45
5. Step 5: Solve for x
   x = 1,407,548.45/1,401.61
6. Step 6: Final answer
   x = 1,004.24