Finding the Fourth Proportional to 2,100.05, 2,900.18 and 1,730.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.05 : 2,900.18 = 1,730.69 : x
2. Step 2: Convert to fraction form
   2,100.05/2,900.18 = 1,730.69/x
3. Step 3: Cross multiply
   2,100.05x = 2,900.18 × 1,730.69
4. Step 4: Simplify right side
   2,100.05x = 5,019,312.52
5. Step 5: Solve for x
   x = 5,019,312.52/2,100.05
6. Step 6: Final answer
   x = 2,390.09