Finding the Fourth Proportional to 78,536.44, 117,853.86 and 31,789.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,536.44 : 117,853.86 = 31,789.31 : x
2. Step 2: Convert to fraction form
   78,536.44/117,853.86 = 31,789.31/x
3. Step 3: Cross multiply
   78,536.44x = 117,853.86 × 31,789.31
4. Step 4: Simplify right side
   78,536.44x = 3,746,492,993.70
5. Step 5: Solve for x
   x = 3,746,492,993.70/78,536.44
6. Step 6: Final answer
   x = 47,703.88