Finding the Fourth Proportional to 118,099.89, 162,990.63 and 72,768.24

Step by Step Solution

1. Step 1: Write the proportion equation
   118,099.89 : 162,990.63 = 72,768.24 : x
2. Step 2: Convert to fraction form
   118,099.89/162,990.63 = 72,768.24/x
3. Step 3: Cross multiply
   118,099.89x = 162,990.63 × 72,768.24
4. Step 4: Simplify right side
   118,099.89x = 11,860,541,281.59
5. Step 5: Solve for x
   x = 11,860,541,281.59/118,099.89
6. Step 6: Final answer
   x = 100,428.05