Finding the Fourth Proportional to 1,401.03, 1,935.90 and 1,009.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.03 : 1,935.90 = 1,009.80 : x
2. Step 2: Convert to fraction form
   1,401.03/1,935.90 = 1,009.80/x
3. Step 3: Cross multiply
   1,401.03x = 1,935.90 × 1,009.80
4. Step 4: Simplify right side
   1,401.03x = 1,954,871.82
5. Step 5: Solve for x
   x = 1,954,871.82/1,401.03
6. Step 6: Final answer
   x = 1,395.31