Finding the Fourth Proportional to 1,810.71, 2,498.63 and 1,222.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,810.71 : 2,498.63 = 1,222.05 : x
2. Step 2: Convert to fraction form
   1,810.71/2,498.63 = 1,222.05/x
3. Step 3: Cross multiply
   1,810.71x = 2,498.63 × 1,222.05
4. Step 4: Simplify right side
   1,810.71x = 3,053,444.68
5. Step 5: Solve for x
   x = 3,053,444.68/1,810.71
6. Step 6: Final answer
   x = 1,686.32