Finding the Fourth Proportional to 1,886.49, 2,601.70 and 1,222.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.49 : 2,601.70 = 1,222.69 : x
2. Step 2: Convert to fraction form
   1,886.49/2,601.70 = 1,222.69/x
3. Step 3: Cross multiply
   1,886.49x = 2,601.70 × 1,222.69
4. Step 4: Simplify right side
   1,886.49x = 3,181,072.57
5. Step 5: Solve for x
   x = 3,181,072.57/1,886.49
6. Step 6: Final answer
   x = 1,686.24