Finding the Fourth Proportional to 1,899.31, 2,619.92 and 1,152.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,899.31 : 2,619.92 = 1,152.89 : x
2. Step 2: Convert to fraction form
   1,899.31/2,619.92 = 1,152.89/x
3. Step 3: Cross multiply
   1,899.31x = 2,619.92 × 1,152.89
4. Step 4: Simplify right side
   1,899.31x = 3,020,473.80
5. Step 5: Solve for x
   x = 3,020,473.80/1,899.31
6. Step 6: Final answer
   x = 1,590.30