Finding the Fourth Proportional to 78,713.76, 117,968.52 and 31,941.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,713.76 : 117,968.52 = 31,941.12 : x
2. Step 2: Convert to fraction form
   78,713.76/117,968.52 = 31,941.12/x
3. Step 3: Cross multiply
   78,713.76x = 117,968.52 × 31,941.12
4. Step 4: Simplify right side
   78,713.76x = 3,768,046,653.54
5. Step 5: Solve for x
   x = 3,768,046,653.54/78,713.76
6. Step 6: Final answer
   x = 47,870.24