Finding the Fourth Proportional to 2,427.90, 3,305.40 and 2,406.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,427.90 : 3,305.40 = 2,406.30 : x
2. Step 2: Convert to fraction form
   2,427.90/3,305.40 = 2,406.30/x
3. Step 3: Cross multiply
   2,427.90x = 3,305.40 × 2,406.30
4. Step 4: Simplify right side
   2,427.90x = 7,953,784.02
5. Step 5: Solve for x
   x = 7,953,784.02/2,427.90
6. Step 6: Final answer
   x = 3,275.99