Finding the Fourth Proportional to 1,436.09, 1,980.59 and 994.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.09 : 1,980.59 = 994.14 : x
2. Step 2: Convert to fraction form
   1,436.09/1,980.59 = 994.14/x
3. Step 3: Cross multiply
   1,436.09x = 1,980.59 × 994.14
4. Step 4: Simplify right side
   1,436.09x = 1,968,978.77
5. Step 5: Solve for x
   x = 1,968,978.77/1,436.09
6. Step 6: Final answer
   x = 1,371.07