Finding the Fourth Proportional to 2,310.15, 3,467.40 and 1,215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.15 : 3,467.40 = 1,215.30 : x
2. Step 2: Convert to fraction form
   2,310.15/3,467.40 = 1,215.30/x
3. Step 3: Cross multiply
   2,310.15x = 3,467.40 × 1,215.30
4. Step 4: Simplify right side
   2,310.15x = 4,213,931.22
5. Step 5: Solve for x
   x = 4,213,931.22/2,310.15
6. Step 6: Final answer
   x = 1,824.09