Finding the Fourth Proportional to 2,310.89, 3,188.90 and 1,262.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.89 : 3,188.90 = 1,262.75 : x
2. Step 2: Convert to fraction form
   2,310.89/3,188.90 = 1,262.75/x
3. Step 3: Cross multiply
   2,310.89x = 3,188.90 × 1,262.75
4. Step 4: Simplify right side
   2,310.89x = 4,026,770.69
5. Step 5: Solve for x
   x = 4,026,770.69/2,310.89
6. Step 6: Final answer
   x = 1,742.52