Finding the Fourth Proportional to 1,323.30, 1,983.15 and 938.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,323.30 : 1,983.15 = 938.10 : x
2. Step 2: Convert to fraction form
   1,323.30/1,983.15 = 938.10/x
3. Step 3: Cross multiply
   1,323.30x = 1,983.15 × 938.10
4. Step 4: Simplify right side
   1,323.30x = 1,860,393.02
5. Step 5: Solve for x
   x = 1,860,393.02/1,323.30
6. Step 6: Final answer
   x = 1,405.87