Finding the Fourth Proportional to 5,145.69, 7,101.12 and 2,787.83

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.69 : 7,101.12 = 2,787.83 : x
2. Step 2: Convert to fraction form
   5,145.69/7,101.12 = 2,787.83/x
3. Step 3: Cross multiply
   5,145.69x = 7,101.12 × 2,787.83
4. Step 4: Simplify right side
   5,145.69x = 19,796,679.86
5. Step 5: Solve for x
   x = 19,796,679.86/5,145.69
6. Step 6: Final answer
   x = 3,847.24