Finding the Fourth Proportional to 2,218.89, 3,062.07 and 1,287.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.89 : 3,062.07 = 1,287.93 : x
2. Step 2: Convert to fraction form
   2,218.89/3,062.07 = 1,287.93/x
3. Step 3: Cross multiply
   2,218.89x = 3,062.07 × 1,287.93
4. Step 4: Simplify right side
   2,218.89x = 3,943,731.82
5. Step 5: Solve for x
   x = 3,943,731.82/2,218.89
6. Step 6: Final answer
   x = 1,777.34