Finding the Fourth Proportional to 1,898.10, 2,848.61 and 1,317.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.10 : 2,848.61 = 1,317.17 : x
2. Step 2: Convert to fraction form
   1,898.10/2,848.61 = 1,317.17/x
3. Step 3: Cross multiply
   1,898.10x = 2,848.61 × 1,317.17
4. Step 4: Simplify right side
   1,898.10x = 3,752,103.63
5. Step 5: Solve for x
   x = 3,752,103.63/1,898.10
6. Step 6: Final answer
   x = 1,976.77