Finding the Fourth Proportional to 79,321.05, 118,978.84 and 31,921.47

Step by Step Solution

1. Step 1: Write the proportion equation
   79,321.05 : 118,978.84 = 31,921.47 : x
2. Step 2: Convert to fraction form
   79,321.05/118,978.84 = 31,921.47/x
3. Step 3: Cross multiply
   79,321.05x = 118,978.84 × 31,921.47
4. Step 4: Simplify right side
   79,321.05x = 3,797,979,471.69
5. Step 5: Solve for x
   x = 3,797,979,471.69/79,321.05
6. Step 6: Final answer
   x = 47,881.10