Finding the Fourth Proportional to 1,989.58, 2,981.94 and 1,015.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.58 : 2,981.94 = 1,015.15 : x
2. Step 2: Convert to fraction form
   1,989.58/2,981.94 = 1,015.15/x
3. Step 3: Cross multiply
   1,989.58x = 2,981.94 × 1,015.15
4. Step 4: Simplify right side
   1,989.58x = 3,027,116.39
5. Step 5: Solve for x
   x = 3,027,116.39/1,989.58
6. Step 6: Final answer
   x = 1,521.49