Finding the Fourth Proportional to 150,572.72, 225,557.96 and 90,568.06

Step by Step Solution

1. Step 1: Write the proportion equation
   150,572.72 : 225,557.96 = 90,568.06 : x
2. Step 2: Convert to fraction form
   150,572.72/225,557.96 = 90,568.06/x
3. Step 3: Cross multiply
   150,572.72x = 225,557.96 × 90,568.06
4. Step 4: Simplify right side
   150,572.72x = 20,428,345,838.02
5. Step 5: Solve for x
   x = 20,428,345,838.02/150,572.72
6. Step 6: Final answer
   x = 135,670.96