Finding the Fourth Proportional to 1,554.63, 2,145.33 and 856.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,554.63 : 2,145.33 = 856.01 : x
2. Step 2: Convert to fraction form
   1,554.63/2,145.33 = 856.01/x
3. Step 3: Cross multiply
   1,554.63x = 2,145.33 × 856.01
4. Step 4: Simplify right side
   1,554.63x = 1,836,413.21
5. Step 5: Solve for x
   x = 1,836,413.21/1,554.63
6. Step 6: Final answer
   x = 1,181.25