Finding the Fourth Proportional to 2,100.32, 2,898.59 and 1,216.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.32 : 2,898.59 = 1,216.13 : x
2. Step 2: Convert to fraction form
   2,100.32/2,898.59 = 1,216.13/x
3. Step 3: Cross multiply
   2,100.32x = 2,898.59 × 1,216.13
4. Step 4: Simplify right side
   2,100.32x = 3,525,062.26
5. Step 5: Solve for x
   x = 3,525,062.26/2,100.32
6. Step 6: Final answer
   x = 1,678.35