Finding the Fourth Proportional to 105,888.58, 146,128.61 and 58,142.13

Step by Step Solution

1. Step 1: Write the proportion equation
   105,888.58 : 146,128.61 = 58,142.13 : x
2. Step 2: Convert to fraction form
   105,888.58/146,128.61 = 58,142.13/x
3. Step 3: Cross multiply
   105,888.58x = 146,128.61 × 58,142.13
4. Step 4: Simplify right side
   105,888.58x = 8,496,228,639.34
5. Step 5: Solve for x
   x = 8,496,228,639.34/105,888.58
6. Step 6: Final answer
   x = 80,237.44