Finding the Fourth Proportional to 1,397.24, 2,096.21 and 987.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.24 : 2,096.21 = 987.18 : x
2. Step 2: Convert to fraction form
   1,397.24/2,096.21 = 987.18/x
3. Step 3: Cross multiply
   1,397.24x = 2,096.21 × 987.18
4. Step 4: Simplify right side
   1,397.24x = 2,069,336.59
5. Step 5: Solve for x
   x = 2,069,336.59/1,397.24
6. Step 6: Final answer
   x = 1,481.02