Finding the Fourth Proportional to 47,980.05, 66,245.09 and 31,025.31

Step by Step Solution

1. Step 1: Write the proportion equation
   47,980.05 : 66,245.09 = 31,025.31 : x
2. Step 2: Convert to fraction form
   47,980.05/66,245.09 = 31,025.31/x
3. Step 3: Cross multiply
   47,980.05x = 66,245.09 × 31,025.31
4. Step 4: Simplify right side
   47,980.05x = 2,055,274,298.10
5. Step 5: Solve for x
   x = 2,055,274,298.10/47,980.05
6. Step 6: Final answer
   x = 42,836.02