Finding the Fourth Proportional to 30,870.12, 42,683.58 and 29,451

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.12 : 42,683.58 = 29,451 : x
2. Step 2: Convert to fraction form
   30,870.12/42,683.58 = 29,451/x
3. Step 3: Cross multiply
   30,870.12x = 42,683.58 × 29,451
4. Step 4: Simplify right side
   30,870.12x = 1,257,074,114.58
5. Step 5: Solve for x
   x = 1,257,074,114.58/30,870.12
6. Step 6: Final answer
   x = 40,721.39