Finding the Fourth Proportional to 5,145.36, 7,100.59 and 2,787.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,145.36 : 7,100.59 = 2,787.50 : x
2. Step 2: Convert to fraction form
   5,145.36/7,100.59 = 2,787.50/x
3. Step 3: Cross multiply
   5,145.36x = 7,100.59 × 2,787.50
4. Step 4: Simplify right side
   5,145.36x = 19,792,870.69
5. Step 5: Solve for x
   x = 19,792,870.69/5,145.36
6. Step 6: Final answer
   x = 3,846.74