Finding the Fourth Proportional to 1,300.12, 1,793.10 and 857.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.12 : 1,793.10 = 857.86 : x
2. Step 2: Convert to fraction form
   1,300.12/1,793.10 = 857.86/x
3. Step 3: Cross multiply
   1,300.12x = 1,793.10 × 857.86
4. Step 4: Simplify right side
   1,300.12x = 1,538,228.77
5. Step 5: Solve for x
   x = 1,538,228.77/1,300.12
6. Step 6: Final answer
   x = 1,183.14