Finding the Fourth Proportional to 105,967.98, 146,242.80 and 58,221.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,967.98 : 146,242.80 = 58,221.72 : x
2. Step 2: Convert to fraction form
   105,967.98/146,242.80 = 58,221.72/x
3. Step 3: Cross multiply
   105,967.98x = 146,242.80 × 58,221.72
4. Step 4: Simplify right side
   105,967.98x = 8,514,507,353.62
5. Step 5: Solve for x
   x = 8,514,507,353.62/105,967.98
6. Step 6: Final answer
   x = 80,349.81