Finding the Fourth Proportional to 105,796.76, 146,040.18 and 71,820.44

Step by Step Solution

1. Step 1: Write the proportion equation
   105,796.76 : 146,040.18 = 71,820.44 : x
2. Step 2: Convert to fraction form
   105,796.76/146,040.18 = 71,820.44/x
3. Step 3: Cross multiply
   105,796.76x = 146,040.18 × 71,820.44
4. Step 4: Simplify right side
   105,796.76x = 10,488,669,255.08
5. Step 5: Solve for x
   x = 10,488,669,255.08/105,796.76
6. Step 6: Final answer
   x = 99,139.80