Finding the Fourth Proportional to 1,436.77, 1,980.89 and 938.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.77 : 1,980.89 = 938.62 : x
2. Step 2: Convert to fraction form
   1,436.77/1,980.89 = 938.62/x
3. Step 3: Cross multiply
   1,436.77x = 1,980.89 × 938.62
4. Step 4: Simplify right side
   1,436.77x = 1,859,293.07
5. Step 5: Solve for x
   x = 1,859,293.07/1,436.77
6. Step 6: Final answer
   x = 1,294.08