Finding the Fourth Proportional to 1,077.81, 1,485.98 and 699.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.81 : 1,485.98 = 699.03 : x
2. Step 2: Convert to fraction form
   1,077.81/1,485.98 = 699.03/x
3. Step 3: Cross multiply
   1,077.81x = 1,485.98 × 699.03
4. Step 4: Simplify right side
   1,077.81x = 1,038,744.60
5. Step 5: Solve for x
   x = 1,038,744.60/1,077.81
6. Step 6: Final answer
   x = 963.75