Finding the Fourth Proportional to 1,347.05, 1,859.15 and 994.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.05 : 1,859.15 = 994.80 : x
2. Step 2: Convert to fraction form
   1,347.05/1,859.15 = 994.80/x
3. Step 3: Cross multiply
   1,347.05x = 1,859.15 × 994.80
4. Step 4: Simplify right side
   1,347.05x = 1,849,481.42
5. Step 5: Solve for x
   x = 1,849,481.42/1,347.05
6. Step 6: Final answer
   x = 1,372.99