Finding the Fourth Proportional to 30,870.56, 42,594 and 18,293.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.56 : 42,594 = 18,293.12 : x
2. Step 2: Convert to fraction form
   30,870.56/42,594 = 18,293.12/x
3. Step 3: Cross multiply
   30,870.56x = 42,594 × 18,293.12
4. Step 4: Simplify right side
   30,870.56x = 779,177,153.28
5. Step 5: Solve for x
   x = 779,177,153.28/30,870.56
6. Step 6: Final answer
   x = 25,240.14