Finding the Fourth Proportional to 2,099.45, 2,897.37 and 1,390.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.45 : 2,897.37 = 1,390.06 : x
2. Step 2: Convert to fraction form
   2,099.45/2,897.37 = 1,390.06/x
3. Step 3: Cross multiply
   2,099.45x = 2,897.37 × 1,390.06
4. Step 4: Simplify right side
   2,099.45x = 4,027,518.14
5. Step 5: Solve for x
   x = 4,027,518.14/2,099.45
6. Step 6: Final answer
   x = 1,918.37