Finding the Fourth Proportional to 5,428.72, 8,143.56 and 1,533.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,428.72 : 8,143.56 = 1,533.12 : x
2. Step 2: Convert to fraction form
   5,428.72/8,143.56 = 1,533.12/x
3. Step 3: Cross multiply
   5,428.72x = 8,143.56 × 1,533.12
4. Step 4: Simplify right side
   5,428.72x = 12,485,054.71
5. Step 5: Solve for x
   x = 12,485,054.71/5,428.72
6. Step 6: Final answer
   x = 2,299.82