Finding the Fourth Proportional to 100,441.71, 150,521.71 and 72,229

Step by Step Solution

1. Step 1: Write the proportion equation
   100,441.71 : 150,521.71 = 72,229 : x
2. Step 2: Convert to fraction form
   100,441.71/150,521.71 = 72,229/x
3. Step 3: Cross multiply
   100,441.71x = 150,521.71 × 72,229
4. Step 4: Simplify right side
   100,441.71x = 10,872,032,591.59
5. Step 5: Solve for x
   x = 10,872,032,591.59/100,441.71
6. Step 6: Final answer
   x = 108,242.21