Finding the Fourth Proportional to 300,047.10, 448,977.15 and 221,315.10

Step by Step Solution

1. Step 1: Write the proportion equation
   300,047.10 : 448,977.15 = 221,315.10 : x
2. Step 2: Convert to fraction form
   300,047.10/448,977.15 = 221,315.10/x
3. Step 3: Cross multiply
   300,047.10x = 448,977.15 × 221,315.10
4. Step 4: Simplify right side
   300,047.10x = 99,365,422,849.97
5. Step 5: Solve for x
   x = 99,365,422,849.97/300,047.10
6. Step 6: Final answer
   x = 331,166.08