Finding the Fourth Proportional to 3,461.77, 5,191.49 and 1,121.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,461.77 : 5,191.49 = 1,121.15 : x
2. Step 2: Convert to fraction form
   3,461.77/5,191.49 = 1,121.15/x
3. Step 3: Cross multiply
   3,461.77x = 5,191.49 × 1,121.15
4. Step 4: Simplify right side
   3,461.77x = 5,820,435.33
5. Step 5: Solve for x
   x = 5,820,435.33/3,461.77
6. Step 6: Final answer
   x = 1,681.35