Finding the Fourth Proportional to 2,188.86, 3,019.34 and 1,515.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.86 : 3,019.34 = 1,515.61 : x
2. Step 2: Convert to fraction form
   2,188.86/3,019.34 = 1,515.61/x
3. Step 3: Cross multiply
   2,188.86x = 3,019.34 × 1,515.61
4. Step 4: Simplify right side
   2,188.86x = 4,576,149.46
5. Step 5: Solve for x
   x = 4,576,149.46/2,188.86
6. Step 6: Final answer
   x = 2,090.66