Finding the Fourth Proportional to 31,036.53, 42,823.94 and 20,297.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.53 : 42,823.94 = 20,297.15 : x
2. Step 2: Convert to fraction form
   31,036.53/42,823.94 = 20,297.15/x
3. Step 3: Cross multiply
   31,036.53x = 42,823.94 × 20,297.15
4. Step 4: Simplify right side
   31,036.53x = 869,203,618.17
5. Step 5: Solve for x
   x = 869,203,618.17/31,036.53
6. Step 6: Final answer
   x = 28,005.82