Finding the Fourth Proportional to 443,557, 612,123.78 and 242,365.96

Step by Step Solution

1. Step 1: Write the proportion equation
   443,557 : 612,123.78 = 242,365.96 : x
2. Step 2: Convert to fraction form
   443,557/612,123.78 = 242,365.96/x
3. Step 3: Cross multiply
   443,557x = 612,123.78 × 242,365.96
4. Step 4: Simplify right side
   443,557x = 148,357,967,578.53
5. Step 5: Solve for x
   x = 148,357,967,578.53/443,557
6. Step 6: Final answer
   x = 334,473.29