Finding the Fourth Proportional to 87,985.74, 131,992.59 and 31,820.09

Step by Step Solution

1. Step 1: Write the proportion equation
   87,985.74 : 131,992.59 = 31,820.09 : x
2. Step 2: Convert to fraction form
   87,985.74/131,992.59 = 31,820.09/x
3. Step 3: Cross multiply
   87,985.74x = 131,992.59 × 31,820.09
4. Step 4: Simplify right side
   87,985.74x = 4,200,016,115.97
5. Step 5: Solve for x
   x = 4,200,016,115.97/87,985.74
6. Step 6: Final answer
   x = 47,735.19