Finding the Fourth Proportional to 2,087.67, 3,128.80 and 1,563.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.67 : 3,128.80 = 1,563.56 : x
2. Step 2: Convert to fraction form
   2,087.67/3,128.80 = 1,563.56/x
3. Step 3: Cross multiply
   2,087.67x = 3,128.80 × 1,563.56
4. Step 4: Simplify right side
   2,087.67x = 4,892,066.53
5. Step 5: Solve for x
   x = 4,892,066.53/2,087.67
6. Step 6: Final answer
   x = 2,343.31