Finding the Fourth Proportional to 1,990.69, 2,747.46 and 1,433.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.69 : 2,747.46 = 1,433.01 : x
2. Step 2: Convert to fraction form
   1,990.69/2,747.46 = 1,433.01/x
3. Step 3: Cross multiply
   1,990.69x = 2,747.46 × 1,433.01
4. Step 4: Simplify right side
   1,990.69x = 3,937,127.20
5. Step 5: Solve for x
   x = 3,937,127.20/1,990.69
6. Step 6: Final answer
   x = 1,977.77