Finding the Fourth Proportional to 630,796.86, 870,469.25 and 358,839.16

Step by Step Solution

1. Step 1: Write the proportion equation
   630,796.86 : 870,469.25 = 358,839.16 : x
2. Step 2: Convert to fraction form
   630,796.86/870,469.25 = 358,839.16/x
3. Step 3: Cross multiply
   630,796.86x = 870,469.25 × 358,839.16
4. Step 4: Simplify right side
   630,796.86x = 312,358,453,196.76
5. Step 5: Solve for x
   x = 312,358,453,196.76/630,796.86
6. Step 6: Final answer
   x = 495,180.74