Finding the Fourth Proportional to 2,103.22, 2,901.23 and 1,315.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.22 : 2,901.23 = 1,315.90 : x
2. Step 2: Convert to fraction form
   2,103.22/2,901.23 = 1,315.90/x
3. Step 3: Cross multiply
   2,103.22x = 2,901.23 × 1,315.90
4. Step 4: Simplify right side
   2,103.22x = 3,817,717.34
5. Step 5: Solve for x
   x = 3,817,717.34/2,103.22
6. Step 6: Final answer
   x = 1,815.18