Finding the Fourth Proportional to 1,435.49, 1,980.27 and 938.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.49 : 1,980.27 = 938.15 : x
2. Step 2: Convert to fraction form
   1,435.49/1,980.27 = 938.15/x
3. Step 3: Cross multiply
   1,435.49x = 1,980.27 × 938.15
4. Step 4: Simplify right side
   1,435.49x = 1,857,780.40
5. Step 5: Solve for x
   x = 1,857,780.40/1,435.49
6. Step 6: Final answer
   x = 1,294.18