Finding the Fourth Proportional to 428,300.16, 642,552.32 and 147,819.84

Step by Step Solution

1. Step 1: Write the proportion equation
   428,300.16 : 642,552.32 = 147,819.84 : x
2. Step 2: Convert to fraction form
   428,300.16/642,552.32 = 147,819.84/x
3. Step 3: Cross multiply
   428,300.16x = 642,552.32 × 147,819.84
4. Step 4: Simplify right side
   428,300.16x = 94,981,981,134.03
5. Step 5: Solve for x
   x = 94,981,981,134.03/428,300.16
6. Step 6: Final answer
   x = 221,764.99