Finding the Fourth Proportional to 2,308.90, 3,181.53 and 1,783.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.90 : 3,181.53 = 1,783.30 : x
2. Step 2: Convert to fraction form
   2,308.90/3,181.53 = 1,783.30/x
3. Step 3: Cross multiply
   2,308.90x = 3,181.53 × 1,783.30
4. Step 4: Simplify right side
   2,308.90x = 5,673,622.45
5. Step 5: Solve for x
   x = 5,673,622.45/2,308.90
6. Step 6: Final answer
   x = 2,457.28