Finding the Fourth Proportional to 21,003.87, 31,506.72 and 9,769.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,003.87 : 31,506.72 = 9,769.76 : x
2. Step 2: Convert to fraction form
   21,003.87/31,506.72 = 9,769.76/x
3. Step 3: Cross multiply
   21,003.87x = 31,506.72 × 9,769.76
4. Step 4: Simplify right side
   21,003.87x = 307,812,935.25
5. Step 5: Solve for x
   x = 307,812,935.25/21,003.87
6. Step 6: Final answer
   x = 14,655.06