Finding the Fourth Proportional to 673,223.94, 929,130.72 and 491,845.10

Step by Step Solution

1. Step 1: Write the proportion equation
   673,223.94 : 929,130.72 = 491,845.10 : x
2. Step 2: Convert to fraction form
   673,223.94/929,130.72 = 491,845.10/x
3. Step 3: Cross multiply
   673,223.94x = 929,130.72 × 491,845.10
4. Step 4: Simplify right side
   673,223.94x = 456,988,387,245.82
5. Step 5: Solve for x
   x = 456,988,387,245.82/673,223.94
6. Step 6: Final answer
   x = 678,805.91