Finding the Fourth Proportional to 1,606.05, 2,213.79 and 1,310.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.05 : 2,213.79 = 1,310.81 : x
2. Step 2: Convert to fraction form
   1,606.05/2,213.79 = 1,310.81/x
3. Step 3: Cross multiply
   1,606.05x = 2,213.79 × 1,310.81
4. Step 4: Simplify right side
   1,606.05x = 2,901,851.52
5. Step 5: Solve for x
   x = 2,901,851.52/1,606.05
6. Step 6: Final answer
   x = 1,806.83