Finding the Fourth Proportional to 31,080.72, 42,894.49 and 18,980.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,080.72 : 42,894.49 = 18,980.53 : x
2. Step 2: Convert to fraction form
   31,080.72/42,894.49 = 18,980.53/x
3. Step 3: Cross multiply
   31,080.72x = 42,894.49 × 18,980.53
4. Step 4: Simplify right side
   31,080.72x = 814,160,154.28
5. Step 5: Solve for x
   x = 814,160,154.28/31,080.72
6. Step 6: Final answer
   x = 26,195.02