Finding the Fourth Proportional to 105,915.13, 146,162.72 and 58,168.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,915.13 : 146,162.72 = 58,168.48 : x
2. Step 2: Convert to fraction form
   105,915.13/146,162.72 = 58,168.48/x
3. Step 3: Cross multiply
   105,915.13x = 146,162.72 × 58,168.48
4. Step 4: Simplify right side
   105,915.13x = 8,502,063,255.07
5. Step 5: Solve for x
   x = 8,502,063,255.07/105,915.13
6. Step 6: Final answer
   x = 80,272.41