Finding the Fourth Proportional to 100,572.50, 150,990.59 and 67,440.82

Step by Step Solution

1. Step 1: Write the proportion equation
   100,572.50 : 150,990.59 = 67,440.82 : x
2. Step 2: Convert to fraction form
   100,572.50/150,990.59 = 67,440.82/x
3. Step 3: Cross multiply
   100,572.50x = 150,990.59 × 67,440.82
4. Step 4: Simplify right side
   100,572.50x = 10,182,929,201.88
5. Step 5: Solve for x
   x = 10,182,929,201.88/100,572.50
6. Step 6: Final answer
   x = 101,249.64