Finding the Fourth Proportional to 502,016.33, 692,779.42 and 287,159.98

Step by Step Solution

1. Step 1: Write the proportion equation
   502,016.33 : 692,779.42 = 287,159.98 : x
2. Step 2: Convert to fraction form
   502,016.33/692,779.42 = 287,159.98/x
3. Step 3: Cross multiply
   502,016.33x = 692,779.42 × 287,159.98
4. Step 4: Simplify right side
   502,016.33x = 198,938,522,955.81
5. Step 5: Solve for x
   x = 198,938,522,955.81/502,016.33
6. Step 6: Final answer
   x = 396,278.99