Finding the Fourth Proportional to 12,995.94, 19,498.56 and 4,230.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,995.94 : 19,498.56 = 4,230.90 : x
2. Step 2: Convert to fraction form
   12,995.94/19,498.56 = 4,230.90/x
3. Step 3: Cross multiply
   12,995.94x = 19,498.56 × 4,230.90
4. Step 4: Simplify right side
   12,995.94x = 82,496,457.50
5. Step 5: Solve for x
   x = 82,496,457.50/12,995.94
6. Step 6: Final answer
   x = 6,347.86