Finding the Fourth Proportional to 2,483.78, 3,725.69 and 840.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,483.78 : 3,725.69 = 840.34 : x
2. Step 2: Convert to fraction form
   2,483.78/3,725.69 = 840.34/x
3. Step 3: Cross multiply
   2,483.78x = 3,725.69 × 840.34
4. Step 4: Simplify right side
   2,483.78x = 3,130,823.50
5. Step 5: Solve for x
   x = 3,130,823.50/2,483.78
6. Step 6: Final answer
   x = 1,260.51