Finding the Fourth Proportional to 75,546.72, 104,258.16 and 42,012

Step by Step Solution

1. Step 1: Write the proportion equation
   75,546.72 : 104,258.16 = 42,012 : x
2. Step 2: Convert to fraction form
   75,546.72/104,258.16 = 42,012/x
3. Step 3: Cross multiply
   75,546.72x = 104,258.16 × 42,012
4. Step 4: Simplify right side
   75,546.72x = 4,380,093,817.92
5. Step 5: Solve for x
   x = 4,380,093,817.92/75,546.72
6. Step 6: Final answer
   x = 57,978.61