Finding the Fourth Proportional to 2,945.34, 4,415.58 and 1,215.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,945.34 : 4,415.58 = 1,215.18 : x
2. Step 2: Convert to fraction form
   2,945.34/4,415.58 = 1,215.18/x
3. Step 3: Cross multiply
   2,945.34x = 4,415.58 × 1,215.18
4. Step 4: Simplify right side
   2,945.34x = 5,365,724.50
5. Step 5: Solve for x
   x = 5,365,724.50/2,945.34
6. Step 6: Final answer
   x = 1,821.77