Finding the Fourth Proportional to 1,885.42, 2,601.96 and 1,139.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.42 : 2,601.96 = 1,139.38 : x
2. Step 2: Convert to fraction form
   1,885.42/2,601.96 = 1,139.38/x
3. Step 3: Cross multiply
   1,885.42x = 2,601.96 × 1,139.38
4. Step 4: Simplify right side
   1,885.42x = 2,964,621.18
5. Step 5: Solve for x
   x = 2,964,621.18/1,885.42
6. Step 6: Final answer
   x = 1,572.39