Finding the Fourth Proportional to 1,945.48, 2,910.92 and 1,080.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.48 : 2,910.92 = 1,080.40 : x
2. Step 2: Convert to fraction form
   1,945.48/2,910.92 = 1,080.40/x
3. Step 3: Cross multiply
   1,945.48x = 2,910.92 × 1,080.40
4. Step 4: Simplify right side
   1,945.48x = 3,144,943.41
5. Step 5: Solve for x
   x = 3,144,943.41/1,945.48
6. Step 6: Final answer
   x = 1,616.54