Finding the Fourth Proportional to 1,216.86, 1,824.33 and 1,085.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.86 : 1,824.33 = 1,085.34 : x
2. Step 2: Convert to fraction form
   1,216.86/1,824.33 = 1,085.34/x
3. Step 3: Cross multiply
   1,216.86x = 1,824.33 × 1,085.34
4. Step 4: Simplify right side
   1,216.86x = 1,980,018.32
5. Step 5: Solve for x
   x = 1,980,018.32/1,216.86
6. Step 6: Final answer
   x = 1,627.15