Finding the Fourth Proportional to 85,871.16, 118,479.78 and 49,563.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,871.16 : 118,479.78 = 49,563.72 : x
2. Step 2: Convert to fraction form
   85,871.16/118,479.78 = 49,563.72/x
3. Step 3: Cross multiply
   85,871.16x = 118,479.78 × 49,563.72
4. Step 4: Simplify right side
   85,871.16x = 5,872,298,641.58
5. Step 5: Solve for x
   x = 5,872,298,641.58/85,871.16
6. Step 6: Final answer
   x = 68,384.99