Finding the Fourth Proportional to 1,886.07, 2,602.32 and 1,222.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,886.07 : 2,602.32 = 1,222.83 : x
2. Step 2: Convert to fraction form
   1,886.07/2,602.32 = 1,222.83/x
3. Step 3: Cross multiply
   1,886.07x = 2,602.32 × 1,222.83
4. Step 4: Simplify right side
   1,886.07x = 3,182,194.97
5. Step 5: Solve for x
   x = 3,182,194.97/1,886.07
6. Step 6: Final answer
   x = 1,687.21