Finding the Fourth Proportional to 2,196.47, 3,290.34 and 1,154.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.47 : 3,290.34 = 1,154.90 : x
2. Step 2: Convert to fraction form
   2,196.47/3,290.34 = 1,154.90/x
3. Step 3: Cross multiply
   2,196.47x = 3,290.34 × 1,154.90
4. Step 4: Simplify right side
   2,196.47x = 3,799,997.21
5. Step 5: Solve for x
   x = 3,799,997.21/2,196.47
6. Step 6: Final answer
   x = 1,730.05