Finding the Fourth Proportional to 1,855.32, 2,781.90 and 1,277.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.32 : 2,781.90 = 1,277.52 : x
2. Step 2: Convert to fraction form
   1,855.32/2,781.90 = 1,277.52/x
3. Step 3: Cross multiply
   1,855.32x = 2,781.90 × 1,277.52
4. Step 4: Simplify right side
   1,855.32x = 3,553,932.89
5. Step 5: Solve for x
   x = 3,553,932.89/1,855.32
6. Step 6: Final answer
   x = 1,915.54