Finding the Fourth Proportional to 2,188.86, 3,020.61 and 1,194.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.86 : 3,020.61 = 1,194.15 : x
2. Step 2: Convert to fraction form
   2,188.86/3,020.61 = 1,194.15/x
3. Step 3: Cross multiply
   2,188.86x = 3,020.61 × 1,194.15
4. Step 4: Simplify right side
   2,188.86x = 3,607,061.43
5. Step 5: Solve for x
   x = 3,607,061.43/2,188.86
6. Step 6: Final answer
   x = 1,647.92