Finding the Fourth Proportional to 105,878.57, 146,112.72 and 58,135.01

Step by Step Solution

1. Step 1: Write the proportion equation
   105,878.57 : 146,112.72 = 58,135.01 : x
2. Step 2: Convert to fraction form
   105,878.57/146,112.72 = 58,135.01/x
3. Step 3: Cross multiply
   105,878.57x = 146,112.72 × 58,135.01
4. Step 4: Simplify right side
   105,878.57x = 8,494,264,438.33
5. Step 5: Solve for x
   x = 8,494,264,438.33/105,878.57
6. Step 6: Final answer
   x = 80,226.47