Finding the Fourth Proportional to 1,356.57, 1,870.41 and 1,146.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.57 : 1,870.41 = 1,146.39 : x
2. Step 2: Convert to fraction form
   1,356.57/1,870.41 = 1,146.39/x
3. Step 3: Cross multiply
   1,356.57x = 1,870.41 × 1,146.39
4. Step 4: Simplify right side
   1,356.57x = 2,144,219.32
5. Step 5: Solve for x
   x = 2,144,219.32/1,356.57
6. Step 6: Final answer
   x = 1,580.62