Finding the Fourth Proportional to 7,189.47, 10,851.72 and 7,189.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,189.47 : 10,851.72 = 7,189.47 : x
2. Step 2: Convert to fraction form
   7,189.47/10,851.72 = 7,189.47/x
3. Step 3: Cross multiply
   7,189.47x = 10,851.72 × 7,189.47
4. Step 4: Simplify right side
   7,189.47x = 78,018,115.39
5. Step 5: Solve for x
   x = 78,018,115.39/7,189.47
6. Step 6: Final answer
   x = 10,851.72