Finding the Fourth Proportional to 105,882.21, 146,117.61 and 58,138.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105,882.21 : 146,117.61 = 58,138.61 : x
2. Step 2: Convert to fraction form
   105,882.21/146,117.61 = 58,138.61/x
3. Step 3: Cross multiply
   105,882.21x = 146,117.61 × 58,138.61
4. Step 4: Simplify right side
   105,882.21x = 8,495,074,011.33
5. Step 5: Solve for x
   x = 8,495,074,011.33/105,882.21
6. Step 6: Final answer
   x = 80,231.36