Finding the Fourth Proportional to 107,906.58, 148,858.16 and 72,105.39

Step by Step Solution

1. Step 1: Write the proportion equation
   107,906.58 : 148,858.16 = 72,105.39 : x
2. Step 2: Convert to fraction form
   107,906.58/148,858.16 = 72,105.39/x
3. Step 3: Cross multiply
   107,906.58x = 148,858.16 × 72,105.39
4. Step 4: Simplify right side
   107,906.58x = 10,733,475,320.96
5. Step 5: Solve for x
   x = 10,733,475,320.96/107,906.58
6. Step 6: Final answer
   x = 99,470.07