Finding the Fourth Proportional to 1,346.82, 1,853.55 and 1,139.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.82 : 1,853.55 = 1,139.72 : x
2. Step 2: Convert to fraction form
   1,346.82/1,853.55 = 1,139.72/x
3. Step 3: Cross multiply
   1,346.82x = 1,853.55 × 1,139.72
4. Step 4: Simplify right side
   1,346.82x = 2,112,518.74
5. Step 5: Solve for x
   x = 2,112,518.74/1,346.82
6. Step 6: Final answer
   x = 1,568.52