Finding the Fourth Proportional to 78,991.61, 118,487.39 and 31,628.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,991.61 : 118,487.39 = 31,628.03 : x
2. Step 2: Convert to fraction form
   78,991.61/118,487.39 = 31,628.03/x
3. Step 3: Cross multiply
   78,991.61x = 118,487.39 × 31,628.03
4. Step 4: Simplify right side
   78,991.61x = 3,747,521,974.96
5. Step 5: Solve for x
   x = 3,747,521,974.96/78,991.61
6. Step 6: Final answer
   x = 47,442.03