Finding the Fourth Proportional to 47,078.29, 64,987.91 and 31,785.55

Step by Step Solution

1. Step 1: Write the proportion equation
   47,078.29 : 64,987.91 = 31,785.55 : x
2. Step 2: Convert to fraction form
   47,078.29/64,987.91 = 31,785.55/x
3. Step 3: Cross multiply
   47,078.29x = 64,987.91 × 31,785.55
4. Step 4: Simplify right side
   47,078.29x = 2,065,676,617.92
5. Step 5: Solve for x
   x = 2,065,676,617.92/47,078.29
6. Step 6: Final answer
   x = 43,877.48