Finding the Fourth Proportional to 31,012.53, 42,801.38 and 30,168.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,012.53 : 42,801.38 = 30,168.15 : x
2. Step 2: Convert to fraction form
   31,012.53/42,801.38 = 30,168.15/x
3. Step 3: Cross multiply
   31,012.53x = 42,801.38 × 30,168.15
4. Step 4: Simplify right side
   31,012.53x = 1,291,238,452.05
5. Step 5: Solve for x
   x = 1,291,238,452.05/31,012.53
6. Step 6: Final answer
   x = 41,636.02