Finding the Fourth Proportional to 105,801.72, 146,015.61 and 58,064.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,801.72 : 146,015.61 = 58,064.28 : x
2. Step 2: Convert to fraction form
   105,801.72/146,015.61 = 58,064.28/x
3. Step 3: Cross multiply
   105,801.72x = 146,015.61 × 58,064.28
4. Step 4: Simplify right side
   105,801.72x = 8,478,291,263.41
5. Step 5: Solve for x
   x = 8,478,291,263.41/105,801.72
6. Step 6: Final answer
   x = 80,133.78