Finding the Fourth Proportional to 118,109.28, 162,994.17 and 72,176.43

Step by Step Solution

1. Step 1: Write the proportion equation
   118,109.28 : 162,994.17 = 72,176.43 : x
2. Step 2: Convert to fraction form
   118,109.28/162,994.17 = 72,176.43/x
3. Step 3: Cross multiply
   118,109.28x = 162,994.17 × 72,176.43
4. Step 4: Simplify right side
   118,109.28x = 11,764,337,301.41
5. Step 5: Solve for x
   x = 11,764,337,301.41/118,109.28
6. Step 6: Final answer
   x = 99,605.53