Finding the Fourth Proportional to 81,401.96, 122,115.18 and 28,811.96

Step by Step Solution

1. Step 1: Write the proportion equation
   81,401.96 : 122,115.18 = 28,811.96 : x
2. Step 2: Convert to fraction form
   81,401.96/122,115.18 = 28,811.96/x
3. Step 3: Cross multiply
   81,401.96x = 122,115.18 × 28,811.96
4. Step 4: Simplify right side
   81,401.96x = 3,518,377,681.55
5. Step 5: Solve for x
   x = 3,518,377,681.55/81,401.96
6. Step 6: Final answer
   x = 43,222.27