Finding the Fourth Proportional to 643,467.82, 888,091.82 and 357,080.17

Step by Step Solution

1. Step 1: Write the proportion equation
   643,467.82 : 888,091.82 = 357,080.17 : x
2. Step 2: Convert to fraction form
   643,467.82/888,091.82 = 357,080.17/x
3. Step 3: Cross multiply
   643,467.82x = 888,091.82 × 357,080.17
4. Step 4: Simplify right side
   643,467.82x = 317,119,978,061.21
5. Step 5: Solve for x
   x = 317,119,978,061.21/643,467.82
6. Step 6: Final answer
   x = 492,829.58