Finding the Fourth Proportional to 404,031.48, 557,564.54 and 242,978.76

Step by Step Solution

1. Step 1: Write the proportion equation
   404,031.48 : 557,564.54 = 242,978.76 : x
2. Step 2: Convert to fraction form
   404,031.48/557,564.54 = 242,978.76/x
3. Step 3: Cross multiply
   404,031.48x = 557,564.54 × 242,978.76
4. Step 4: Simplify right side
   404,031.48x = 135,476,340,549.17
5. Step 5: Solve for x
   x = 135,476,340,549.17/404,031.48
6. Step 6: Final answer
   x = 335,311.35