Finding the Fourth Proportional to 2,103.51, 2,901.96 and 1,218.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.51 : 2,901.96 = 1,218.99 : x
2. Step 2: Convert to fraction form
   2,103.51/2,901.96 = 1,218.99/x
3. Step 3: Cross multiply
   2,103.51x = 2,901.96 × 1,218.99
4. Step 4: Simplify right side
   2,103.51x = 3,537,460.22
5. Step 5: Solve for x
   x = 3,537,460.22/2,103.51
6. Step 6: Final answer
   x = 1,681.69