Finding the Fourth Proportional to 75,656, 104,406 and 42,122.72

Step by Step Solution

1. Step 1: Write the proportion equation
   75,656 : 104,406 = 42,122.72 : x
2. Step 2: Convert to fraction form
   75,656/104,406 = 42,122.72/x
3. Step 3: Cross multiply
   75,656x = 104,406 × 42,122.72
4. Step 4: Simplify right side
   75,656x = 4,397,864,704.32
5. Step 5: Solve for x
   x = 4,397,864,704.32/75,656
6. Step 6: Final answer
   x = 58,129.75