Finding the Fourth Proportional to 1,409.18, 2,111.90 and 792.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.18 : 2,111.90 = 792.58 : x
2. Step 2: Convert to fraction form
   1,409.18/2,111.90 = 792.58/x
3. Step 3: Cross multiply
   1,409.18x = 2,111.90 × 792.58
4. Step 4: Simplify right side
   1,409.18x = 1,673,849.70
5. Step 5: Solve for x
   x = 1,673,849.70/1,409.18
6. Step 6: Final answer
   x = 1,187.82