Finding the Fourth Proportional to 1,945.59, 2,911.83 and 1,122.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.59 : 2,911.83 = 1,122.63 : x
2. Step 2: Convert to fraction form
   1,945.59/2,911.83 = 1,122.63/x
3. Step 3: Cross multiply
   1,945.59x = 2,911.83 × 1,122.63
4. Step 4: Simplify right side
   1,945.59x = 3,268,907.71
5. Step 5: Solve for x
   x = 3,268,907.71/1,945.59
6. Step 6: Final answer
   x = 1,680.16