Finding the Fourth Proportional to 502,019.33, 692,783.55 and 287,162.98

Step by Step Solution

1. Step 1: Write the proportion equation
   502,019.33 : 692,783.55 = 287,162.98 : x
2. Step 2: Convert to fraction form
   502,019.33/692,783.55 = 287,162.98/x
3. Step 3: Cross multiply
   502,019.33x = 692,783.55 × 287,162.98
4. Step 4: Simplify right side
   502,019.33x = 198,941,788,712.98
5. Step 5: Solve for x
   x = 198,941,788,712.98/502,019.33
6. Step 6: Final answer
   x = 396,283.12