Finding the Fourth Proportional to 7,190.72, 10,783.95 and 2,807.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,190.72 : 10,783.95 = 2,807.12 : x
2. Step 2: Convert to fraction form
   7,190.72/10,783.95 = 2,807.12/x
3. Step 3: Cross multiply
   7,190.72x = 10,783.95 × 2,807.12
4. Step 4: Simplify right side
   7,190.72x = 30,271,841.72
5. Step 5: Solve for x
   x = 30,271,841.72/7,190.72
6. Step 6: Final answer
   x = 4,209.85