Finding the Fourth Proportional to 1,554.94, 2,145.72 and 856.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.94 : 2,145.72 = 856.32 : x
2. Step 2: Convert to fraction form
   1,554.94/2,145.72 = 856.32/x
3. Step 3: Cross multiply
   1,554.94x = 2,145.72 × 856.32
4. Step 4: Simplify right side
   1,554.94x = 1,837,422.95
5. Step 5: Solve for x
   x = 1,837,422.95/1,554.94
6. Step 6: Final answer
   x = 1,181.67