Finding the Fourth Proportional to 85,469.76, 128,168.64 and 34,854.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,469.76 : 128,168.64 = 34,854.72 : x
2. Step 2: Convert to fraction form
   85,469.76/128,168.64 = 34,854.72/x
3. Step 3: Cross multiply
   85,469.76x = 128,168.64 × 34,854.72
4. Step 4: Simplify right side
   85,469.76x = 4,467,282,059.98
5. Step 5: Solve for x
   x = 4,467,282,059.98/85,469.76
6. Step 6: Final answer
   x = 52,267.40