Finding the Fourth Proportional to 620,499.42, 930,519.27 and 221,034.06

Step by Step Solution

1. Step 1: Write the proportion equation
   620,499.42 : 930,519.27 = 221,034.06 : x
2. Step 2: Convert to fraction form
   620,499.42/930,519.27 = 221,034.06/x
3. Step 3: Cross multiply
   620,499.42x = 930,519.27 × 221,034.06
4. Step 4: Simplify right side
   620,499.42x = 205,676,452,156.34
5. Step 5: Solve for x
   x = 205,676,452,156.34/620,499.42
6. Step 6: Final answer
   x = 331,469.21