Finding the Fourth Proportional to 287,667.18, 397,010.16 and 172,983.06

Step by Step Solution

1. Step 1: Write the proportion equation
   287,667.18 : 397,010.16 = 172,983.06 : x
2. Step 2: Convert to fraction form
   287,667.18/397,010.16 = 172,983.06/x
3. Step 3: Cross multiply
   287,667.18x = 397,010.16 × 172,983.06
4. Step 4: Simplify right side
   287,667.18x = 68,676,032,327.89
5. Step 5: Solve for x
   x = 68,676,032,327.89/287,667.18
6. Step 6: Final answer
   x = 238,734.33