Finding the Fourth Proportional to 10,688.10, 16,003.35 and 8,384.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.10 : 16,003.35 = 8,384.10 : x
2. Step 2: Convert to fraction form
   10,688.10/16,003.35 = 8,384.10/x
3. Step 3: Cross multiply
   10,688.10x = 16,003.35 × 8,384.10
4. Step 4: Simplify right side
   10,688.10x = 134,173,686.74
5. Step 5: Solve for x
   x = 134,173,686.74/10,688.10
6. Step 6: Final answer
   x = 12,553.56