Finding the Fourth Proportional to 457,061.16, 630,669.42 and 287,175

Step by Step Solution

1. Step 1: Write the proportion equation
   457,061.16 : 630,669.42 = 287,175 : x
2. Step 2: Convert to fraction form
   457,061.16/630,669.42 = 287,175/x
3. Step 3: Cross multiply
   457,061.16x = 630,669.42 × 287,175
4. Step 4: Simplify right side
   457,061.16x = 181,112,490,688.50
5. Step 5: Solve for x
   x = 181,112,490,688.50/457,061.16
6. Step 6: Final answer
   x = 396,254.39