Finding the Fourth Proportional to 1,916.56, 2,641.98 and 1,328.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.56 : 2,641.98 = 1,328.32 : x
2. Step 2: Convert to fraction form
   1,916.56/2,641.98 = 1,328.32/x
3. Step 3: Cross multiply
   1,916.56x = 2,641.98 × 1,328.32
4. Step 4: Simplify right side
   1,916.56x = 3,509,394.87
5. Step 5: Solve for x
   x = 3,509,394.87/1,916.56
6. Step 6: Final answer
   x = 1,831.09