Finding the Fourth Proportional to 1,381.45, 2,074.61 and 1,271.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.45 : 2,074.61 = 1,271.52 : x
2. Step 2: Convert to fraction form
   1,381.45/2,074.61 = 1,271.52/x
3. Step 3: Cross multiply
   1,381.45x = 2,074.61 × 1,271.52
4. Step 4: Simplify right side
   1,381.45x = 2,637,901.75
5. Step 5: Solve for x
   x = 2,637,901.75/1,381.45
6. Step 6: Final answer
   x = 1,909.52