Finding the Fourth Proportional to 105,814.78, 146,026.36 and 58,069.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,814.78 : 146,026.36 = 58,069.83 : x
2. Step 2: Convert to fraction form
   105,814.78/146,026.36 = 58,069.83/x
3. Step 3: Cross multiply
   105,814.78x = 146,026.36 × 58,069.83
4. Step 4: Simplify right side
   105,814.78x = 8,479,726,520.90
5. Step 5: Solve for x
   x = 8,479,726,520.90/105,814.78
6. Step 6: Final answer
   x = 80,137.45