Finding the Fourth Proportional to 3,810.40, 5,746.72 and 3,637.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,810.40 : 5,746.72 = 3,637.60 : x
2. Step 2: Convert to fraction form
   3,810.40/5,746.72 = 3,637.60/x
3. Step 3: Cross multiply
   3,810.40x = 5,746.72 × 3,637.60
4. Step 4: Simplify right side
   3,810.40x = 20,904,268.67
5. Step 5: Solve for x
   x = 20,904,268.67/3,810.40
6. Step 6: Final answer
   x = 5,486.11