Finding the Fourth Proportional to 2,217.16, 3,060.30 and 1,285.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.16 : 3,060.30 = 1,285.84 : x
2. Step 2: Convert to fraction form
   2,217.16/3,060.30 = 1,285.84/x
3. Step 3: Cross multiply
   2,217.16x = 3,060.30 × 1,285.84
4. Step 4: Simplify right side
   2,217.16x = 3,935,056.15
5. Step 5: Solve for x
   x = 3,935,056.15/2,217.16
6. Step 6: Final answer
   x = 1,774.82