Finding the Fourth Proportional to 1,610.69, 2,222.56 and 902.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.69 : 2,222.56 = 902.43 : x
2. Step 2: Convert to fraction form
   1,610.69/2,222.56 = 902.43/x
3. Step 3: Cross multiply
   1,610.69x = 2,222.56 × 902.43
4. Step 4: Simplify right side
   1,610.69x = 2,005,704.82
5. Step 5: Solve for x
   x = 2,005,704.82/1,610.69
6. Step 6: Final answer
   x = 1,245.25