Finding the Fourth Proportional to 2,271.35, 3,131.93 and 1,431.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.35 : 3,131.93 = 1,431.05 : x
2. Step 2: Convert to fraction form
   2,271.35/3,131.93 = 1,431.05/x
3. Step 3: Cross multiply
   2,271.35x = 3,131.93 × 1,431.05
4. Step 4: Simplify right side
   2,271.35x = 4,481,925.61
5. Step 5: Solve for x
   x = 4,481,925.61/2,271.35
6. Step 6: Final answer
   x = 1,973.25