Finding the Fourth Proportional to 620,662.96, 930,969.15 and 215,947.82

Step by Step Solution

1. Step 1: Write the proportion equation
   620,662.96 : 930,969.15 = 215,947.82 : x
2. Step 2: Convert to fraction form
   620,662.96/930,969.15 = 215,947.82/x
3. Step 3: Cross multiply
   620,662.96x = 930,969.15 × 215,947.82
4. Step 4: Simplify right side
   620,662.96x = 201,040,758,429.75
5. Step 5: Solve for x
   x = 201,040,758,429.75/620,662.96
6. Step 6: Final answer
   x = 323,912.93