Finding the Fourth Proportional to 10,120.72, 15,187.94 and 3,547

Step by Step Solution

1. Step 1: Write the proportion equation
   10,120.72 : 15,187.94 = 3,547 : x
2. Step 2: Convert to fraction form
   10,120.72/15,187.94 = 3,547/x
3. Step 3: Cross multiply
   10,120.72x = 15,187.94 × 3,547
4. Step 4: Simplify right side
   10,120.72x = 53,871,623.18
5. Step 5: Solve for x
   x = 53,871,623.18/10,120.72
6. Step 6: Final answer
   x = 5,322.90