Finding the Fourth Proportional to 1,538.06, 2,121.72 and 1,271.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.06 : 2,121.72 = 1,271.48 : x
2. Step 2: Convert to fraction form
   1,538.06/2,121.72 = 1,271.48/x
3. Step 3: Cross multiply
   1,538.06x = 2,121.72 × 1,271.48
4. Step 4: Simplify right side
   1,538.06x = 2,697,724.55
5. Step 5: Solve for x
   x = 2,697,724.55/1,538.06
6. Step 6: Final answer
   x = 1,753.98