Finding the Fourth Proportional to 212,679.72, 293,518.69 and 158,871.31

Step by Step Solution

1. Step 1: Write the proportion equation
   212,679.72 : 293,518.69 = 158,871.31 : x
2. Step 2: Convert to fraction form
   212,679.72/293,518.69 = 158,871.31/x
3. Step 3: Cross multiply
   212,679.72x = 293,518.69 × 158,871.31
4. Step 4: Simplify right side
   212,679.72x = 46,631,698,789.78
5. Step 5: Solve for x
   x = 46,631,698,789.78/212,679.72
6. Step 6: Final answer
   x = 219,257.85