Finding the Fourth Proportional to 1,886.50, 2,601.69 and 1,222.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.50 : 2,601.69 = 1,222.69 : x
2. Step 2: Convert to fraction form
   1,886.50/2,601.69 = 1,222.69/x
3. Step 3: Cross multiply
   1,886.50x = 2,601.69 × 1,222.69
4. Step 4: Simplify right side
   1,886.50x = 3,181,060.35
5. Step 5: Solve for x
   x = 3,181,060.35/1,886.50
6. Step 6: Final answer
   x = 1,686.22