Finding the Fourth Proportional to 85,307.05, 127,960.56 and 45,809.83

Step by Step Solution

1. Step 1: Write the proportion equation
   85,307.05 : 127,960.56 = 45,809.83 : x
2. Step 2: Convert to fraction form
   85,307.05/127,960.56 = 45,809.83/x
3. Step 3: Cross multiply
   85,307.05x = 127,960.56 × 45,809.83
4. Step 4: Simplify right side
   85,307.05x = 5,861,851,500.30
5. Step 5: Solve for x
   x = 5,861,851,500.30/85,307.05
6. Step 6: Final answer
   x = 68,714.74