Finding the Fourth Proportional to 501,002.21, 691,411.61 and 297,173.81

Step by Step Solution

1. Step 1: Write the proportion equation
   501,002.21 : 691,411.61 = 297,173.81 : x
2. Step 2: Convert to fraction form
   501,002.21/691,411.61 = 297,173.81/x
3. Step 3: Cross multiply
   501,002.21x = 691,411.61 × 297,173.81
4. Step 4: Simplify right side
   501,002.21x = 205,469,422,421.93
5. Step 5: Solve for x
   x = 205,469,422,421.93/501,002.21
6. Step 6: Final answer
   x = 410,116.80