Finding the Fourth Proportional to 78,086.94, 117,152.28 and 31,372.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,086.94 : 117,152.28 = 31,372.62 : x
2. Step 2: Convert to fraction form
   78,086.94/117,152.28 = 31,372.62/x
3. Step 3: Cross multiply
   78,086.94x = 117,152.28 × 31,372.62
4. Step 4: Simplify right side
   78,086.94x = 3,675,373,962.57
5. Step 5: Solve for x
   x = 3,675,373,962.57/78,086.94
6. Step 6: Final answer
   x = 47,067.72