Finding the Fourth Proportional to 100,620.32, 150,540.24 and 72,604.88

Step by Step Solution

1. Step 1: Write the proportion equation
   100,620.32 : 150,540.24 = 72,604.88 : x
2. Step 2: Convert to fraction form
   100,620.32/150,540.24 = 72,604.88/x
3. Step 3: Cross multiply
   100,620.32x = 150,540.24 × 72,604.88
4. Step 4: Simplify right side
   100,620.32x = 10,929,956,060.37
5. Step 5: Solve for x
   x = 10,929,956,060.37/100,620.32
6. Step 6: Final answer
   x = 108,625.73