Finding the Fourth Proportional to 1,139.01, 1,707.77 and 554.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.01 : 1,707.77 = 554.00 : x
2. Step 2: Convert to fraction form
   1,139.01/1,707.77 = 554.00/x
3. Step 3: Cross multiply
   1,139.01x = 1,707.77 × 554.00
4. Step 4: Simplify right side
   1,139.01x = 946,093.27
5. Step 5: Solve for x
   x = 946,093.27/1,139.01
6. Step 6: Final answer
   x = 830.63