Finding the Fourth Proportional to 298,663.83, 448,061.31 and 219,538.17

Step by Step Solution

1. Step 1: Write the proportion equation
   298,663.83 : 448,061.31 = 219,538.17 : x
2. Step 2: Convert to fraction form
   298,663.83/448,061.31 = 219,538.17/x
3. Step 3: Cross multiply
   298,663.83x = 448,061.31 × 219,538.17
4. Step 4: Simplify right side
   298,663.83x = 98,366,560,045.20
5. Step 5: Solve for x
   x = 98,366,560,045.20/298,663.83
6. Step 6: Final answer
   x = 329,355.45