Finding the Fourth Proportional to 1,376.31, 2,060.79 and 790.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.31 : 2,060.79 = 790.43 : x
2. Step 2: Convert to fraction form
   1,376.31/2,060.79 = 790.43/x
3. Step 3: Cross multiply
   1,376.31x = 2,060.79 × 790.43
4. Step 4: Simplify right side
   1,376.31x = 1,628,922.82
5. Step 5: Solve for x
   x = 1,628,922.82/1,376.31
6. Step 6: Final answer
   x = 1,183.54