Finding the Fourth Proportional to 1,013.00, 1,518.93 and 661.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.00 : 1,518.93 = 661.01 : x
2. Step 2: Convert to fraction form
   1,013.00/1,518.93 = 661.01/x
3. Step 3: Cross multiply
   1,013.00x = 1,518.93 × 661.01
4. Step 4: Simplify right side
   1,013.00x = 1,004,020.32
5. Step 5: Solve for x
   x = 1,004,020.32/1,013.00
6. Step 6: Final answer
   x = 991.14