Finding the Fourth Proportional to 10,916.91, 16,380.29 and 4,678.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,916.91 : 16,380.29 = 4,678.56 : x
2. Step 2: Convert to fraction form
   10,916.91/16,380.29 = 4,678.56/x
3. Step 3: Cross multiply
   10,916.91x = 16,380.29 × 4,678.56
4. Step 4: Simplify right side
   10,916.91x = 76,636,146.19
5. Step 5: Solve for x
   x = 76,636,146.19/10,916.91
6. Step 6: Final answer
   x = 7,019.95