Finding the Fourth Proportional to 12,977.82, 17,910.72 and 7,945.37

Step by Step Solution

1. Step 1: Write the proportion equation
   12,977.82 : 17,910.72 = 7,945.37 : x
2. Step 2: Convert to fraction form
   12,977.82/17,910.72 = 7,945.37/x
3. Step 3: Cross multiply
   12,977.82x = 17,910.72 × 7,945.37
4. Step 4: Simplify right side
   12,977.82x = 142,307,207.81
5. Step 5: Solve for x
   x = 142,307,207.81/12,977.82
6. Step 6: Final answer
   x = 10,965.42