Finding the Fourth Proportional to 2,100.59, 2,898.62 and 1,216.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.59 : 2,898.62 = 1,216.45 : x
2. Step 2: Convert to fraction form
   2,100.59/2,898.62 = 1,216.45/x
3. Step 3: Cross multiply
   2,100.59x = 2,898.62 × 1,216.45
4. Step 4: Simplify right side
   2,100.59x = 3,526,026.30
5. Step 5: Solve for x
   x = 3,526,026.30/2,100.59
6. Step 6: Final answer
   x = 1,678.59