Finding the Fourth Proportional to 2,271.96, 3,128.76 and 1,572.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.96 : 3,128.76 = 1,572.12 : x
2. Step 2: Convert to fraction form
   2,271.96/3,128.76 = 1,572.12/x
3. Step 3: Cross multiply
   2,271.96x = 3,128.76 × 1,572.12
4. Step 4: Simplify right side
   2,271.96x = 4,918,786.17
5. Step 5: Solve for x
   x = 4,918,786.17/2,271.96
6. Step 6: Final answer
   x = 2,165.00