Finding the Fourth Proportional to 78,118.12, 117,182.66 and 31,371

Step by Step Solution

1. Step 1: Write the proportion equation
   78,118.12 : 117,182.66 = 31,371 : x
2. Step 2: Convert to fraction form
   78,118.12/117,182.66 = 31,371/x
3. Step 3: Cross multiply
   78,118.12x = 117,182.66 × 31,371
4. Step 4: Simplify right side
   78,118.12x = 3,676,137,226.86
5. Step 5: Solve for x
   x = 3,676,137,226.86/78,118.12
6. Step 6: Final answer
   x = 47,058.70