Finding the Fourth Proportional to 1,245.18, 1,866.72 and 833.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,245.18 : 1,866.72 = 833.06 : x
2. Step 2: Convert to fraction form
   1,245.18/1,866.72 = 833.06/x
3. Step 3: Cross multiply
   1,245.18x = 1,866.72 × 833.06
4. Step 4: Simplify right side
   1,245.18x = 1,555,094.43
5. Step 5: Solve for x
   x = 1,555,094.43/1,245.18
6. Step 6: Final answer
   x = 1,248.89