Finding the Fourth Proportional to 8,429.94, 12,646.96 and 2,807.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.94 : 12,646.96 = 2,807.60 : x
2. Step 2: Convert to fraction form
   8,429.94/12,646.96 = 2,807.60/x
3. Step 3: Cross multiply
   8,429.94x = 12,646.96 × 2,807.60
4. Step 4: Simplify right side
   8,429.94x = 35,507,545.17
5. Step 5: Solve for x
   x = 35,507,545.17/8,429.94
6. Step 6: Final answer
   x = 4,212.08