Finding the Fourth Proportional to 1,421.56, 1,961.79 and 792.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.56 : 1,961.79 = 792.16 : x
2. Step 2: Convert to fraction form
   1,421.56/1,961.79 = 792.16/x
3. Step 3: Cross multiply
   1,421.56x = 1,961.79 × 792.16
4. Step 4: Simplify right side
   1,421.56x = 1,554,051.57
5. Step 5: Solve for x
   x = 1,554,051.57/1,421.56
6. Step 6: Final answer
   x = 1,093.20