Finding the Fourth Proportional to 2,078.31, 3,116.61 and 923.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.31 : 3,116.61 = 923.25 : x
2. Step 2: Convert to fraction form
   2,078.31/3,116.61 = 923.25/x
3. Step 3: Cross multiply
   2,078.31x = 3,116.61 × 923.25
4. Step 4: Simplify right side
   2,078.31x = 2,877,410.18
5. Step 5: Solve for x
   x = 2,877,410.18/2,078.31
6. Step 6: Final answer
   x = 1,384.50