Finding the Fourth Proportional to 6,510.14, 8,981.67 and 3,991.34

Step by Step Solution

1. Step 1: Write the proportion equation
   6,510.14 : 8,981.67 = 3,991.34 : x
2. Step 2: Convert to fraction form
   6,510.14/8,981.67 = 3,991.34/x
3. Step 3: Cross multiply
   6,510.14x = 8,981.67 × 3,991.34
4. Step 4: Simplify right side
   6,510.14x = 35,848,898.74
5. Step 5: Solve for x
   x = 35,848,898.74/6,510.14
6. Step 6: Final answer
   x = 5,506.62