Finding the Fourth Proportional to 1,871.88, 2,587.86 and 1,405.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.88 : 2,587.86 = 1,405.32 : x
2. Step 2: Convert to fraction form
   1,871.88/2,587.86 = 1,405.32/x
3. Step 3: Cross multiply
   1,871.88x = 2,587.86 × 1,405.32
4. Step 4: Simplify right side
   1,871.88x = 3,636,771.42
5. Step 5: Solve for x
   x = 3,636,771.42/1,871.88
6. Step 6: Final answer
   x = 1,942.84