Finding the Fourth Proportional to 1,459.30, 2,012.59 and 987.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,459.30 : 2,012.59 = 987.07 : x
2. Step 2: Convert to fraction form
   1,459.30/2,012.59 = 987.07/x
3. Step 3: Cross multiply
   1,459.30x = 2,012.59 × 987.07
4. Step 4: Simplify right side
   1,459.30x = 1,986,559.71
5. Step 5: Solve for x
   x = 1,986,559.71/1,459.30
6. Step 6: Final answer
   x = 1,361.31