Finding the Fourth Proportional to 105,818.23, 146,031.56 and 58,074.63

Step by Step Solution

1. Step 1: Write the proportion equation
   105,818.23 : 146,031.56 = 58,074.63 : x
2. Step 2: Convert to fraction form
   105,818.23/146,031.56 = 58,074.63/x
3. Step 3: Cross multiply
   105,818.23x = 146,031.56 × 58,074.63
4. Step 4: Simplify right side
   105,818.23x = 8,480,728,815.32
5. Step 5: Solve for x
   x = 8,480,728,815.32/105,818.23
6. Step 6: Final answer
   x = 80,144.31