Finding the Fourth Proportional to 1,402.20, 1,934.18 and 930.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.20 : 1,934.18 = 930.12 : x
2. Step 2: Convert to fraction form
   1,402.20/1,934.18 = 930.12/x
3. Step 3: Cross multiply
   1,402.20x = 1,934.18 × 930.12
4. Step 4: Simplify right side
   1,402.20x = 1,799,019.50
5. Step 5: Solve for x
   x = 1,799,019.50/1,402.20
6. Step 6: Final answer
   x = 1,283.00