Finding the Fourth Proportional to 465,673.72, 697,926.12 and 199,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   465,673.72 : 697,926.12 = 199,120.72 : x
2. Step 2: Convert to fraction form
   465,673.72/697,926.12 = 199,120.72/x
3. Step 3: Cross multiply
   465,673.72x = 697,926.12 × 199,120.72
4. Step 4: Simplify right side
   465,673.72x = 138,971,551,521.21
5. Step 5: Solve for x
   x = 138,971,551,521.21/465,673.72
6. Step 6: Final answer
   x = 298,431.17