Finding the Fourth Proportional to 2,799.77, 4,200.12 and 1,338.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.77 : 4,200.12 = 1,338.89 : x
2. Step 2: Convert to fraction form
   2,799.77/4,200.12 = 1,338.89/x
3. Step 3: Cross multiply
   2,799.77x = 4,200.12 × 1,338.89
4. Step 4: Simplify right side
   2,799.77x = 5,623,477.67
5. Step 5: Solve for x
   x = 5,623,477.67/2,799.77
6. Step 6: Final answer
   x = 2,008.55