Finding the Fourth Proportional to 85,404.75, 128,184.86 and 45,457.27

Step by Step Solution

1. Step 1: Write the proportion equation
   85,404.75 : 128,184.86 = 45,457.27 : x
2. Step 2: Convert to fraction form
   85,404.75/128,184.86 = 45,457.27/x
3. Step 3: Cross multiply
   85,404.75x = 128,184.86 × 45,457.27
4. Step 4: Simplify right side
   85,404.75x = 5,826,933,790.93
5. Step 5: Solve for x
   x = 5,826,933,790.93/85,404.75
6. Step 6: Final answer
   x = 68,227.28