Finding the Fourth Proportional to 673,685.91, 929,598.32 and 401,785.72

Step by Step Solution

1. Step 1: Write the proportion equation
   673,685.91 : 929,598.32 = 401,785.72 : x
2. Step 2: Convert to fraction form
   673,685.91/929,598.32 = 401,785.72/x
3. Step 3: Cross multiply
   673,685.91x = 929,598.32 × 401,785.72
4. Step 4: Simplify right side
   673,685.91x = 373,499,328,992.46
5. Step 5: Solve for x
   x = 373,499,328,992.46/673,685.91
6. Step 6: Final answer
   x = 554,411.67