Finding the Fourth Proportional to 105,900.90, 146,133.72 and 58,153.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,900.90 : 146,133.72 = 58,153.20 : x
2. Step 2: Convert to fraction form
   105,900.90/146,133.72 = 58,153.20/x
3. Step 3: Cross multiply
   105,900.90x = 146,133.72 × 58,153.20
4. Step 4: Simplify right side
   105,900.90x = 8,498,143,445.90
5. Step 5: Solve for x
   x = 8,498,143,445.90/105,900.90
6. Step 6: Final answer
   x = 80,246.19