Finding the Fourth Proportional to 105,831.40, 146,042.76 and 58,085.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,831.40 : 146,042.76 = 58,085.56 : x
2. Step 2: Convert to fraction form
   105,831.40/146,042.76 = 58,085.56/x
3. Step 3: Cross multiply
   105,831.40x = 146,042.76 × 58,085.56
4. Step 4: Simplify right side
   105,831.40x = 8,482,975,498.55
5. Step 5: Solve for x
   x = 8,482,975,498.55/105,831.40
6. Step 6: Final answer
   x = 80,155.56