Finding the Fourth Proportional to 2,085.34, 2,878.05 and 1,201.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.34 : 2,878.05 = 1,201.15 : x
2. Step 2: Convert to fraction form
   2,085.34/2,878.05 = 1,201.15/x
3. Step 3: Cross multiply
   2,085.34x = 2,878.05 × 1,201.15
4. Step 4: Simplify right side
   2,085.34x = 3,456,969.76
5. Step 5: Solve for x
   x = 3,456,969.76/2,085.34
6. Step 6: Final answer
   x = 1,657.75