Finding the Fourth Proportional to 503,928, 755,969.76 and 188,429.76

Step by Step Solution

1. Step 1: Write the proportion equation
   503,928 : 755,969.76 = 188,429.76 : x
2. Step 2: Convert to fraction form
   503,928/755,969.76 = 188,429.76/x
3. Step 3: Cross multiply
   503,928x = 755,969.76 × 188,429.76
4. Step 4: Simplify right side
   503,928x = 142,447,200,444.06
5. Step 5: Solve for x
   x = 142,447,200,444.06/503,928
6. Step 6: Final answer
   x = 282,673.72