Finding the Fourth Proportional to 1,806.96, 2,491.89 and 1,570.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.96 : 2,491.89 = 1,570.74 : x
2. Step 2: Convert to fraction form
   1,806.96/2,491.89 = 1,570.74/x
3. Step 3: Cross multiply
   1,806.96x = 2,491.89 × 1,570.74
4. Step 4: Simplify right side
   1,806.96x = 3,914,111.30
5. Step 5: Solve for x
   x = 3,914,111.30/1,806.96
6. Step 6: Final answer
   x = 2,166.13