Finding the Fourth Proportional to 8,640.52, 11,918.28 and 5,100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,640.52 : 11,918.28 = 5,100.82 : x
2. Step 2: Convert to fraction form
   8,640.52/11,918.28 = 5,100.82/x
3. Step 3: Cross multiply
   8,640.52x = 11,918.28 × 5,100.82
4. Step 4: Simplify right side
   8,640.52x = 60,793,000.99
5. Step 5: Solve for x
   x = 60,793,000.99/8,640.52
6. Step 6: Final answer
   x = 7,035.80