Finding the Fourth Proportional to 1,885.56, 2,601.09 and 1,139.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.56 : 2,601.09 = 1,139.10 : x
2. Step 2: Convert to fraction form
   1,885.56/2,601.09 = 1,139.10/x
3. Step 3: Cross multiply
   1,885.56x = 2,601.09 × 1,139.10
4. Step 4: Simplify right side
   1,885.56x = 2,962,901.62
5. Step 5: Solve for x
   x = 2,962,901.62/1,885.56
6. Step 6: Final answer
   x = 1,571.36