Finding the Fourth Proportional to 1,380.54, 1,897.22 and 1,316.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.54 : 1,897.22 = 1,316.30 : x
2. Step 2: Convert to fraction form
   1,380.54/1,897.22 = 1,316.30/x
3. Step 3: Cross multiply
   1,380.54x = 1,897.22 × 1,316.30
4. Step 4: Simplify right side
   1,380.54x = 2,497,315.16
5. Step 5: Solve for x
   x = 2,497,315.16/1,380.54
6. Step 6: Final answer
   x = 1,808.94