Finding the Fourth Proportional to 1,397.21, 2,099.59 and 1,030.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.21 : 2,099.59 = 1,030.82 : x
2. Step 2: Convert to fraction form
   1,397.21/2,099.59 = 1,030.82/x
3. Step 3: Cross multiply
   1,397.21x = 2,099.59 × 1,030.82
4. Step 4: Simplify right side
   1,397.21x = 2,164,286.29
5. Step 5: Solve for x
   x = 2,164,286.29/1,397.21
6. Step 6: Final answer
   x = 1,549.01