Finding the Fourth Proportional to 215,359.67, 323,040.72 and 191,776.52

Step by Step Solution

1. Step 1: Write the proportion equation
   215,359.67 : 323,040.72 = 191,776.52 : x
2. Step 2: Convert to fraction form
   215,359.67/323,040.72 = 191,776.52/x
3. Step 3: Cross multiply
   215,359.67x = 323,040.72 × 191,776.52
4. Step 4: Simplify right side
   215,359.67x = 61,951,625,099.89
5. Step 5: Solve for x
   x = 61,951,625,099.89/215,359.67
6. Step 6: Final answer
   x = 287,665.86