Finding the Fourth Proportional to 2,637.06, 3,957.96 and 1,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,637.06 : 3,957.96 = 1,405.50 : x
2. Step 2: Convert to fraction form
   2,637.06/3,957.96 = 1,405.50/x
3. Step 3: Cross multiply
   2,637.06x = 3,957.96 × 1,405.50
4. Step 4: Simplify right side
   2,637.06x = 5,562,912.78
5. Step 5: Solve for x
   x = 5,562,912.78/2,637.06
6. Step 6: Final answer
   x = 2,109.51