Finding the Fourth Proportional to 2,099.33, 2,897.19 and 1,389.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.33 : 2,897.19 = 1,389.93 : x
2. Step 2: Convert to fraction form
   2,099.33/2,897.19 = 1,389.93/x
3. Step 3: Cross multiply
   2,099.33x = 2,897.19 × 1,389.93
4. Step 4: Simplify right side
   2,099.33x = 4,026,891.30
5. Step 5: Solve for x
   x = 4,026,891.30/2,099.33
6. Step 6: Final answer
   x = 1,918.18