Finding the Fourth Proportional to 672,498.72, 1,008,895.68 and 199,221.12

Step by Step Solution

1. Step 1: Write the proportion equation
   672,498.72 : 1,008,895.68 = 199,221.12 : x
2. Step 2: Convert to fraction form
   672,498.72/1,008,895.68 = 199,221.12/x
3. Step 3: Cross multiply
   672,498.72x = 1,008,895.68 × 199,221.12
4. Step 4: Simplify right side
   672,498.72x = 200,993,327,332.76
5. Step 5: Solve for x
   x = 200,993,327,332.76/672,498.72
6. Step 6: Final answer
   x = 298,875.41