Finding the Fourth Proportional to 1,948.78, 2,689.30 and 1,152.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,948.78 : 2,689.30 = 1,152.39 : x
2. Step 2: Convert to fraction form
   1,948.78/2,689.30 = 1,152.39/x
3. Step 3: Cross multiply
   1,948.78x = 2,689.30 × 1,152.39
4. Step 4: Simplify right side
   1,948.78x = 3,099,108.98
5. Step 5: Solve for x
   x = 3,099,108.98/1,948.78
6. Step 6: Final answer
   x = 1,590.29