Finding the Fourth Proportional to 2,807.07, 3,872.82 and 1,813.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,807.07 : 3,872.82 = 1,813.02 : x
2. Step 2: Convert to fraction form
   2,807.07/3,872.82 = 1,813.02/x
3. Step 3: Cross multiply
   2,807.07x = 3,872.82 × 1,813.02
4. Step 4: Simplify right side
   2,807.07x = 7,021,500.12
5. Step 5: Solve for x
   x = 7,021,500.12/2,807.07
6. Step 6: Final answer
   x = 2,501.36