Finding the Fourth Proportional to 12,971.82, 19,457.46 and 4,206.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,971.82 : 19,457.46 = 4,206.72 : x
2. Step 2: Convert to fraction form
   12,971.82/19,457.46 = 4,206.72/x
3. Step 3: Cross multiply
   12,971.82x = 19,457.46 × 4,206.72
4. Step 4: Simplify right side
   12,971.82x = 81,852,086.13
5. Step 5: Solve for x
   x = 81,852,086.13/12,971.82
6. Step 6: Final answer
   x = 6,309.99