Finding the Fourth Proportional to 1,410.68, 2,114.76 and 890.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.68 : 2,114.76 = 890.30 : x
2. Step 2: Convert to fraction form
   1,410.68/2,114.76 = 890.30/x
3. Step 3: Cross multiply
   1,410.68x = 2,114.76 × 890.30
4. Step 4: Simplify right side
   1,410.68x = 1,882,770.83
5. Step 5: Solve for x
   x = 1,882,770.83/1,410.68
6. Step 6: Final answer
   x = 1,334.65