Finding the Fourth Proportional to 10,389.84, 15,563.16 and 7,047.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,389.84 : 15,563.16 = 7,047.60 : x
2. Step 2: Convert to fraction form
   10,389.84/15,563.16 = 7,047.60/x
3. Step 3: Cross multiply
   10,389.84x = 15,563.16 × 7,047.60
4. Step 4: Simplify right side
   10,389.84x = 109,682,926.42
5. Step 5: Solve for x
   x = 109,682,926.42/10,389.84
6. Step 6: Final answer
   x = 10,556.75