Finding the Fourth Proportional to 2,218.87, 3,061.50 and 1,356.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.87 : 3,061.50 = 1,356.30 : x
2. Step 2: Convert to fraction form
   2,218.87/3,061.50 = 1,356.30/x
3. Step 3: Cross multiply
   2,218.87x = 3,061.50 × 1,356.30
4. Step 4: Simplify right side
   2,218.87x = 4,152,304.49
5. Step 5: Solve for x
   x = 4,152,304.49/2,218.87
6. Step 6: Final answer
   x = 1,871.36