Finding the Fourth Proportional to 250,356.10, 376,028.04 and 215,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   250,356.10 : 376,028.04 = 215,105.30 : x
2. Step 2: Convert to fraction form
   250,356.10/376,028.04 = 215,105.30/x
3. Step 3: Cross multiply
   250,356.10x = 376,028.04 × 215,105.30
4. Step 4: Simplify right side
   250,356.10x = 80,885,626,099.33
5. Step 5: Solve for x
   x = 80,885,626,099.33/250,356.10
6. Step 6: Final answer
   x = 323,082.31