Finding the Fourth Proportional to 2,191.89, 3,024.88 and 1,247.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.89 : 3,024.88 = 1,247.66 : x
2. Step 2: Convert to fraction form
   2,191.89/3,024.88 = 1,247.66/x
3. Step 3: Cross multiply
   2,191.89x = 3,024.88 × 1,247.66
4. Step 4: Simplify right side
   2,191.89x = 3,774,021.78
5. Step 5: Solve for x
   x = 3,774,021.78/2,191.89
6. Step 6: Final answer
   x = 1,721.81