Finding the Fourth Proportional to 5,145.91, 7,101.34 and 2,788.04

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.91 : 7,101.34 = 2,788.04 : x
2. Step 2: Convert to fraction form
   5,145.91/7,101.34 = 2,788.04/x
3. Step 3: Cross multiply
   5,145.91x = 7,101.34 × 2,788.04
4. Step 4: Simplify right side
   5,145.91x = 19,798,830.76
5. Step 5: Solve for x
   x = 19,798,830.76/5,145.91
6. Step 6: Final answer
   x = 3,847.49