Finding the Fourth Proportional to 1,898.69, 2,619.27 and 1,478.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.69 : 2,619.27 = 1,478.30 : x
2. Step 2: Convert to fraction form
   1,898.69/2,619.27 = 1,478.30/x
3. Step 3: Cross multiply
   1,898.69x = 2,619.27 × 1,478.30
4. Step 4: Simplify right side
   1,898.69x = 3,872,066.84
5. Step 5: Solve for x
   x = 3,872,066.84/1,898.69
6. Step 6: Final answer
   x = 2,039.34