Finding the Third Proportional to 5,490.84 and 8,730.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,490.84 : 8,730.56 = 8,730.56 : x
2. Step 2: Convert to fraction form
   5,490.84/8,730.56 = 8,730.56/x
3. Step 3: Cross multiply
   5,490.84x = 8,730.56 × 8,730.56
4. Step 4: Simplify right side
   5,490.84x = 76,222,721.57
5. Step 5: Solve for x
   x = 76,222,721.57/5,490.84
6. Step 6: Final answer
   x = 13,881.79