Finding the Fourth Proportional to 8,406.90, 12,612.15 and 2,564.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,406.90 : 12,612.15 = 2,564.10 : x
2. Step 2: Convert to fraction form
   8,406.90/12,612.15 = 2,564.10/x
3. Step 3: Cross multiply
   8,406.90x = 12,612.15 × 2,564.10
4. Step 4: Simplify right side
   8,406.90x = 32,338,813.82
5. Step 5: Solve for x
   x = 32,338,813.82/8,406.90
6. Step 6: Final answer
   x = 3,846.70