Finding the Fourth Proportional to 1,309.76, 1,805.37 and 994.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,309.76 : 1,805.37 = 994.00 : x
2. Step 2: Convert to fraction form
   1,309.76/1,805.37 = 994.00/x
3. Step 3: Cross multiply
   1,309.76x = 1,805.37 × 994.00
4. Step 4: Simplify right side
   1,309.76x = 1,794,528.75
5. Step 5: Solve for x
   x = 1,794,528.75/1,309.76
6. Step 6: Final answer
   x = 1,370.12