Finding the Fourth Proportional to 1,435.14, 1,979.71 and 987.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.14 : 1,979.71 = 987.05 : x
2. Step 2: Convert to fraction form
   1,435.14/1,979.71 = 987.05/x
3. Step 3: Cross multiply
   1,435.14x = 1,979.71 × 987.05
4. Step 4: Simplify right side
   1,435.14x = 1,954,075.24
5. Step 5: Solve for x
   x = 1,954,075.24/1,435.14
6. Step 6: Final answer
   x = 1,361.59