Finding the Fourth Proportional to 1,806.45, 2,490.17 and 1,412.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.45 : 2,490.17 = 1,412.79 : x
2. Step 2: Convert to fraction form
   1,806.45/2,490.17 = 1,412.79/x
3. Step 3: Cross multiply
   1,806.45x = 2,490.17 × 1,412.79
4. Step 4: Simplify right side
   1,806.45x = 3,518,087.27
5. Step 5: Solve for x
   x = 3,518,087.27/1,806.45
6. Step 6: Final answer
   x = 1,947.51