Finding the Fourth Proportional to 2,100.89, 2,912.81 and 1,975.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.89 : 2,912.81 = 1,975.13 : x
2. Step 2: Convert to fraction form
   2,100.89/2,912.81 = 1,975.13/x
3. Step 3: Cross multiply
   2,100.89x = 2,912.81 × 1,975.13
4. Step 4: Simplify right side
   2,100.89x = 5,753,192.39
5. Step 5: Solve for x
   x = 5,753,192.39/2,100.89
6. Step 6: Final answer
   x = 2,738.46