Finding the Fourth Proportional to 1,421.55, 1,961.70 and 792.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.55 : 1,961.70 = 792.05 : x
2. Step 2: Convert to fraction form
   1,421.55/1,961.70 = 792.05/x
3. Step 3: Cross multiply
   1,421.55x = 1,961.70 × 792.05
4. Step 4: Simplify right side
   1,421.55x = 1,553,764.49
5. Step 5: Solve for x
   x = 1,553,764.49/1,421.55
6. Step 6: Final answer
   x = 1,093.01