Finding the Fourth Proportional to 1,401.88, 2,101.65 and 938.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.88 : 2,101.65 = 938.25 : x
2. Step 2: Convert to fraction form
   1,401.88/2,101.65 = 938.25/x
3. Step 3: Cross multiply
   1,401.88x = 2,101.65 × 938.25
4. Step 4: Simplify right side
   1,401.88x = 1,971,860.73
5. Step 5: Solve for x
   x = 1,971,860.73/1,401.88
6. Step 6: Final answer
   x = 1,406.58