Finding the Fourth Proportional to 12,965.82, 19,448.46 and 4,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.82 : 19,448.46 = 4,200.72 : x
2. Step 2: Convert to fraction form
   12,965.82/19,448.46 = 4,200.72/x
3. Step 3: Cross multiply
   12,965.82x = 19,448.46 × 4,200.72
4. Step 4: Simplify right side
   12,965.82x = 81,697,534.89
5. Step 5: Solve for x
   x = 81,697,534.89/12,965.82
6. Step 6: Final answer
   x = 6,300.99