Finding the Fourth Proportional to 150,898.72, 226,386.56 and 70,921.20

Step by Step Solution

1. Step 1: Write the proportion equation
   150,898.72 : 226,386.56 = 70,921.20 : x
2. Step 2: Convert to fraction form
   150,898.72/226,386.56 = 70,921.20/x
3. Step 3: Cross multiply
   150,898.72x = 226,386.56 × 70,921.20
4. Step 4: Simplify right side
   150,898.72x = 16,055,606,499.07
5. Step 5: Solve for x
   x = 16,055,606,499.07/150,898.72
6. Step 6: Final answer
   x = 106,399.89