Finding the Fourth Proportional to 2,100.60, 3,135.56 and 1,806.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.60 : 3,135.56 = 1,806.30 : x
2. Step 2: Convert to fraction form
   2,100.60/3,135.56 = 1,806.30/x
3. Step 3: Cross multiply
   2,100.60x = 3,135.56 × 1,806.30
4. Step 4: Simplify right side
   2,100.60x = 5,663,762.03
5. Step 5: Solve for x
   x = 5,663,762.03/2,100.60
6. Step 6: Final answer
   x = 2,696.26