Finding the Fourth Proportional to 31,034.53, 42,821.17 and 20,295.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,034.53 : 42,821.17 = 20,295.15 : x
2. Step 2: Convert to fraction form
   31,034.53/42,821.17 = 20,295.15/x
3. Step 3: Cross multiply
   31,034.53x = 42,821.17 × 20,295.15
4. Step 4: Simplify right side
   31,034.53x = 869,062,068.33
5. Step 5: Solve for x
   x = 869,062,068.33/31,034.53
6. Step 6: Final answer
   x = 28,003.07