Finding the Fourth Proportional to 672,900.30, 928,623.15 and 386,477.82

Step by Step Solution

1. Step 1: Write the proportion equation
   672,900.30 : 928,623.15 = 386,477.82 : x
2. Step 2: Convert to fraction form
   672,900.30/928,623.15 = 386,477.82/x
3. Step 3: Cross multiply
   672,900.30x = 928,623.15 × 386,477.82
4. Step 4: Simplify right side
   672,900.30x = 358,892,250,613.53
5. Step 5: Solve for x
   x = 358,892,250,613.53/672,900.30
6. Step 6: Final answer
   x = 533,351.30