Finding the Fourth Proportional to 15,530.02, 21,431.46 and 8,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,530.02 : 21,431.46 = 8,456.50 : x
2. Step 2: Convert to fraction form
   15,530.02/21,431.46 = 8,456.50/x
3. Step 3: Cross multiply
   15,530.02x = 21,431.46 × 8,456.50
4. Step 4: Simplify right side
   15,530.02x = 181,235,141.49
5. Step 5: Solve for x
   x = 181,235,141.49/15,530.02
6. Step 6: Final answer
   x = 11,669.99