Finding the Fourth Proportional to 1,885.32, 2,601.79 and 1,139.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.32 : 2,601.79 = 1,139.18 : x
2. Step 2: Convert to fraction form
   1,885.32/2,601.79 = 1,139.18/x
3. Step 3: Cross multiply
   1,885.32x = 2,601.79 × 1,139.18
4. Step 4: Simplify right side
   1,885.32x = 2,963,891.28
5. Step 5: Solve for x
   x = 2,963,891.28/1,885.32
6. Step 6: Final answer
   x = 1,572.09