Finding the Fourth Proportional to 502,459.98, 693,433.35 and 287,667.42

Step by Step Solution

1. Step 1: Write the proportion equation
   502,459.98 : 693,433.35 = 287,667.42 : x
2. Step 2: Convert to fraction form
   502,459.98/693,433.35 = 287,667.42/x
3. Step 3: Cross multiply
   502,459.98x = 693,433.35 × 287,667.42
4. Step 4: Simplify right side
   502,459.98x = 199,478,182,736.46
5. Step 5: Solve for x
   x = 199,478,182,736.46/502,459.98
6. Step 6: Final answer
   x = 397,003.13