Finding the Fourth Proportional to 1,401.31, 2,100.84 and 908.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.31 : 2,100.84 = 908.22 : x
2. Step 2: Convert to fraction form
   1,401.31/2,100.84 = 908.22/x
3. Step 3: Cross multiply
   1,401.31x = 2,100.84 × 908.22
4. Step 4: Simplify right side
   1,401.31x = 1,908,024.90
5. Step 5: Solve for x
   x = 1,908,024.90/1,401.31
6. Step 6: Final answer
   x = 1,361.60