Finding the Fourth Proportional to 7,908.72, 10,918.40 and 5,918.52

Step by Step Solution

1. Step 1: Write the proportion equation
   7,908.72 : 10,918.40 = 5,918.52 : x
2. Step 2: Convert to fraction form
   7,908.72/10,918.40 = 5,918.52/x
3. Step 3: Cross multiply
   7,908.72x = 10,918.40 × 5,918.52
4. Step 4: Simplify right side
   7,908.72x = 64,620,768.77
5. Step 5: Solve for x
   x = 64,620,768.77/7,908.72
6. Step 6: Final answer
   x = 8,170.83