Finding the Fourth Proportional to 1,389.06, 2,082.53 and 841.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.06 : 2,082.53 = 841.10 : x
2. Step 2: Convert to fraction form
   1,389.06/2,082.53 = 841.10/x
3. Step 3: Cross multiply
   1,389.06x = 2,082.53 × 841.10
4. Step 4: Simplify right side
   1,389.06x = 1,751,607.67
5. Step 5: Solve for x
   x = 1,751,607.67/1,389.06
6. Step 6: Final answer
   x = 1,261.00