Finding the Fourth Proportional to 4,997.30, 7,502.78 and 2,807.56

Step by Step Solution

1. Step 1: Write the proportion equation
   4,997.30 : 7,502.78 = 2,807.56 : x
2. Step 2: Convert to fraction form
   4,997.30/7,502.78 = 2,807.56/x
3. Step 3: Cross multiply
   4,997.30x = 7,502.78 × 2,807.56
4. Step 4: Simplify right side
   4,997.30x = 21,064,505.62
5. Step 5: Solve for x
   x = 21,064,505.62/4,997.30
6. Step 6: Final answer
   x = 4,215.18