Finding the Fourth Proportional to 2,100.45, 2,899.00 and 1,216.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.45 : 2,899.00 = 1,216.33 : x
2. Step 2: Convert to fraction form
   2,100.45/2,899.00 = 1,216.33/x
3. Step 3: Cross multiply
   2,100.45x = 2,899.00 × 1,216.33
4. Step 4: Simplify right side
   2,100.45x = 3,526,137.63
5. Step 5: Solve for x
   x = 3,526,137.63/2,100.45
6. Step 6: Final answer
   x = 1,678.76