Finding the Fourth Proportional to 1,418.02, 2,124.15 and 931.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.02 : 2,124.15 = 931.30 : x
2. Step 2: Convert to fraction form
   1,418.02/2,124.15 = 931.30/x
3. Step 3: Cross multiply
   1,418.02x = 2,124.15 × 931.30
4. Step 4: Simplify right side
   1,418.02x = 1,978,220.90
5. Step 5: Solve for x
   x = 1,978,220.90/1,418.02
6. Step 6: Final answer
   x = 1,395.06