Finding the Fourth Proportional to 5,609.69, 8,415.47 and 2,100.94

Step by Step Solution

1. Step 1: Write the proportion equation
   5,609.69 : 8,415.47 = 2,100.94 : x
2. Step 2: Convert to fraction form
   5,609.69/8,415.47 = 2,100.94/x
3. Step 3: Cross multiply
   5,609.69x = 8,415.47 × 2,100.94
4. Step 4: Simplify right side
   5,609.69x = 17,680,397.54
5. Step 5: Solve for x
   x = 17,680,397.54/5,609.69
6. Step 6: Final answer
   x = 3,151.76