Finding the Fourth Proportional to 551,942.33, 828,005.69 and 172,787.61

Step by Step Solution

1. Step 1: Write the proportion equation
   551,942.33 : 828,005.69 = 172,787.61 : x
2. Step 2: Convert to fraction form
   551,942.33/828,005.69 = 172,787.61/x
3. Step 3: Cross multiply
   551,942.33x = 828,005.69 × 172,787.61
4. Step 4: Simplify right side
   551,942.33x = 143,069,123,377.56
5. Step 5: Solve for x
   x = 143,069,123,377.56/551,942.33
6. Step 6: Final answer
   x = 259,210.28