Finding the Fourth Proportional to 12,977.01, 17,908.39 and 7,311.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,977.01 : 17,908.39 = 7,311.77 : x
2. Step 2: Convert to fraction form
   12,977.01/17,908.39 = 7,311.77/x
3. Step 3: Cross multiply
   12,977.01x = 17,908.39 × 7,311.77
4. Step 4: Simplify right side
   12,977.01x = 130,942,015.50
5. Step 5: Solve for x
   x = 130,942,015.50/12,977.01
6. Step 6: Final answer
   x = 10,090.31