Finding the Fourth Proportional to 10,416.82, 15,636.03 and 6,978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,416.82 : 15,636.03 = 6,978.10 : x
2. Step 2: Convert to fraction form
   10,416.82/15,636.03 = 6,978.10/x
3. Step 3: Cross multiply
   10,416.82x = 15,636.03 × 6,978.10
4. Step 4: Simplify right side
   10,416.82x = 109,109,780.94
5. Step 5: Solve for x
   x = 109,109,780.94/10,416.82
6. Step 6: Final answer
   x = 10,474.38