Finding the Fourth Proportional to 1,381.56, 1,906.64 and 792.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.56 : 1,906.64 = 792.30 : x
2. Step 2: Convert to fraction form
   1,381.56/1,906.64 = 792.30/x
3. Step 3: Cross multiply
   1,381.56x = 1,906.64 × 792.30
4. Step 4: Simplify right side
   1,381.56x = 1,510,630.87
5. Step 5: Solve for x
   x = 1,510,630.87/1,381.56
6. Step 6: Final answer
   x = 1,093.42