Finding the Fourth Proportional to 2,131.12, 3,188.58 and 1,295.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.12 : 3,188.58 = 1,295.20 : x
2. Step 2: Convert to fraction form
   2,131.12/3,188.58 = 1,295.20/x
3. Step 3: Cross multiply
   2,131.12x = 3,188.58 × 1,295.20
4. Step 4: Simplify right side
   2,131.12x = 4,129,848.82
5. Step 5: Solve for x
   x = 4,129,848.82/2,131.12
6. Step 6: Final answer
   x = 1,937.88