Finding the Fourth Proportional to 85,631.89, 118,167.81 and 47,390.75

Step by Step Solution

1. Step 1: Write the proportion equation
   85,631.89 : 118,167.81 = 47,390.75 : x
2. Step 2: Convert to fraction form
   85,631.89/118,167.81 = 47,390.75/x
3. Step 3: Cross multiply
   85,631.89x = 118,167.81 × 47,390.75
4. Step 4: Simplify right side
   85,631.89x = 5,600,061,141.76
5. Step 5: Solve for x
   x = 5,600,061,141.76/85,631.89
6. Step 6: Final answer
   x = 65,396.92