Finding the Fourth Proportional to 2,102.55, 2,901.23 and 1,306.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,102.55 : 2,901.23 = 1,306.05 : x
2. Step 2: Convert to fraction form
   2,102.55/2,901.23 = 1,306.05/x
3. Step 3: Cross multiply
   2,102.55x = 2,901.23 × 1,306.05
4. Step 4: Simplify right side
   2,102.55x = 3,789,144.91
5. Step 5: Solve for x
   x = 3,789,144.91/2,102.55
6. Step 6: Final answer
   x = 1,802.17