Finding the Fourth Proportional to 353,674.05, 488,107.41 and 309,663.39

Step by Step Solution

1. Step 1: Write the proportion equation
   353,674.05 : 488,107.41 = 309,663.39 : x
2. Step 2: Convert to fraction form
   353,674.05/488,107.41 = 309,663.39/x
3. Step 3: Cross multiply
   353,674.05x = 488,107.41 × 309,663.39
4. Step 4: Simplify right side
   353,674.05x = 151,148,995,264.72
5. Step 5: Solve for x
   x = 151,148,995,264.72/353,674.05
6. Step 6: Final answer
   x = 427,368.07