Finding the Fourth Proportional to 57,308.05, 85,987.86 and 30,981.97

Step by Step Solution

1. Step 1: Write the proportion equation
   57,308.05 : 85,987.86 = 30,981.97 : x
2. Step 2: Convert to fraction form
   57,308.05/85,987.86 = 30,981.97/x
3. Step 3: Cross multiply
   57,308.05x = 85,987.86 × 30,981.97
4. Step 4: Simplify right side
   57,308.05x = 2,664,073,298.88
5. Step 5: Solve for x
   x = 2,664,073,298.88/57,308.05
6. Step 6: Final answer
   x = 46,486.89