Finding the Fourth Proportional to 12,921.30, 19,384.83 and 7,076.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,921.30 : 19,384.83 = 7,076.34 : x
2. Step 2: Convert to fraction form
   12,921.30/19,384.83 = 7,076.34/x
3. Step 3: Cross multiply
   12,921.30x = 19,384.83 × 7,076.34
4. Step 4: Simplify right side
   12,921.30x = 137,173,647.92
5. Step 5: Solve for x
   x = 137,173,647.92/12,921.30
6. Step 6: Final answer
   x = 10,616.09