Finding the Fourth Proportional to 157,419.28, 217,238.69 and 89,436.37

Step by Step Solution

1. Step 1: Write the proportion equation
   157,419.28 : 217,238.69 = 89,436.37 : x
2. Step 2: Convert to fraction form
   157,419.28/217,238.69 = 89,436.37/x
3. Step 3: Cross multiply
   157,419.28x = 217,238.69 × 89,436.37
4. Step 4: Simplify right side
   157,419.28x = 19,429,039,857.16
5. Step 5: Solve for x
   x = 19,429,039,857.16/157,419.28
6. Step 6: Final answer
   x = 123,422.24