Finding the Fourth Proportional to 5,111.10, 7,653.69 and 2,799.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.10 : 7,653.69 = 2,799.90 : x
2. Step 2: Convert to fraction form
   5,111.10/7,653.69 = 2,799.90/x
3. Step 3: Cross multiply
   5,111.10x = 7,653.69 × 2,799.90
4. Step 4: Simplify right side
   5,111.10x = 21,429,566.63
5. Step 5: Solve for x
   x = 21,429,566.63/5,111.10
6. Step 6: Final answer
   x = 4,192.75