Finding the Fourth Proportional to 553,900.27, 764,385.72 and 308,900.52

Step by Step Solution

1. Step 1: Write the proportion equation
   553,900.27 : 764,385.72 = 308,900.52 : x
2. Step 2: Convert to fraction form
   553,900.27/764,385.72 = 308,900.52/x
3. Step 3: Cross multiply
   553,900.27x = 764,385.72 × 308,900.52
4. Step 4: Simplify right side
   553,900.27x = 236,119,146,388.57
5. Step 5: Solve for x
   x = 236,119,146,388.57/553,900.27
6. Step 6: Final answer
   x = 426,284.58