Finding the Fourth Proportional to 35,131.14, 48,471.21 and 20,978.82

Step by Step Solution

1. Step 1: Write the proportion equation
   35,131.14 : 48,471.21 = 20,978.82 : x
2. Step 2: Convert to fraction form
   35,131.14/48,471.21 = 20,978.82/x
3. Step 3: Cross multiply
   35,131.14x = 48,471.21 × 20,978.82
4. Step 4: Simplify right side
   35,131.14x = 1,016,868,789.77
5. Step 5: Solve for x
   x = 1,016,868,789.77/35,131.14
6. Step 6: Final answer
   x = 28,944.94