Finding the Fourth Proportional to 1,898.39, 2,619.59 and 1,152.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,898.39 : 2,619.59 = 1,152.31 : x
2. Step 2: Convert to fraction form
   1,898.39/2,619.59 = 1,152.31/x
3. Step 3: Cross multiply
   1,898.39x = 2,619.59 × 1,152.31
4. Step 4: Simplify right side
   1,898.39x = 3,018,576.08
5. Step 5: Solve for x
   x = 3,018,576.08/1,898.39
6. Step 6: Final answer
   x = 1,590.07