Finding the Fourth Proportional to 1,774.56, 2,660.16 and 1,389.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,774.56 : 2,660.16 = 1,389.60 : x
2. Step 2: Convert to fraction form
   1,774.56/2,660.16 = 1,389.60/x
3. Step 3: Cross multiply
   1,774.56x = 2,660.16 × 1,389.60
4. Step 4: Simplify right side
   1,774.56x = 3,696,558.34
5. Step 5: Solve for x
   x = 3,696,558.34/1,774.56
6. Step 6: Final answer
   x = 2,083.08