Finding the Fourth Proportional to 159,172.78, 238,826.69 and 74,931.10

Step by Step Solution

1. Step 1: Write the proportion equation
   159,172.78 : 238,826.69 = 74,931.10 : x
2. Step 2: Convert to fraction form
   159,172.78/238,826.69 = 74,931.10/x
3. Step 3: Cross multiply
   159,172.78x = 238,826.69 × 74,931.10
4. Step 4: Simplify right side
   159,172.78x = 17,895,546,591.06
5. Step 5: Solve for x
   x = 17,895,546,591.06/159,172.78
6. Step 6: Final answer
   x = 112,428.44