Finding the Fourth Proportional to 81,446.76, 122,205 and 42,031.55

Step by Step Solution

1. Step 1: Write the proportion equation
   81,446.76 : 122,205 = 42,031.55 : x
2. Step 2: Convert to fraction form
   81,446.76/122,205 = 42,031.55/x
3. Step 3: Cross multiply
   81,446.76x = 122,205 × 42,031.55
4. Step 4: Simplify right side
   81,446.76x = 5,136,464,956.73
5. Step 5: Solve for x
   x = 5,136,464,956.73/81,446.76
6. Step 6: Final answer
   x = 63,065.31