Finding the Fourth Proportional to 81,458.03, 122,253.06 and 42,026.42

Step by Step Solution

1. Step 1: Write the proportion equation
   81,458.03 : 122,253.06 = 42,026.42 : x
2. Step 2: Convert to fraction form
   81,458.03/122,253.06 = 42,026.42/x
3. Step 3: Cross multiply
   81,458.03x = 122,253.06 × 42,026.42
4. Step 4: Simplify right side
   81,458.03x = 5,137,858,445.85
5. Step 5: Solve for x
   x = 5,137,858,445.85/81,458.03
6. Step 6: Final answer
   x = 63,073.69