Finding the Fourth Proportional to 509,500.47, 764,250.69 and 228,689.67

Step by Step Solution

1. Step 1: Write the proportion equation
   509,500.47 : 764,250.69 = 228,689.67 : x
2. Step 2: Convert to fraction form
   509,500.47/764,250.69 = 228,689.67/x
3. Step 3: Cross multiply
   509,500.47x = 764,250.69 × 228,689.67
4. Step 4: Simplify right side
   509,500.47x = 174,776,238,093.37
5. Step 5: Solve for x
   x = 174,776,238,093.37/509,500.47
6. Step 6: Final answer
   x = 343,034.50