Finding the Fourth Proportional to 1,884.24, 2,599.89 and 1,221.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,884.24 : 2,599.89 = 1,221.03 : x
2. Step 2: Convert to fraction form
   1,884.24/2,599.89 = 1,221.03/x
3. Step 3: Cross multiply
   1,884.24x = 2,599.89 × 1,221.03
4. Step 4: Simplify right side
   1,884.24x = 3,174,543.69
5. Step 5: Solve for x
   x = 3,174,543.69/1,884.24
6. Step 6: Final answer
   x = 1,684.79