Finding the Fourth Proportional to 30,973.60, 42,738.78 and 18,233.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,973.60 : 42,738.78 = 18,233.20 : x
2. Step 2: Convert to fraction form
   30,973.60/42,738.78 = 18,233.20/x
3. Step 3: Cross multiply
   30,973.60x = 42,738.78 × 18,233.20
4. Step 4: Simplify right side
   30,973.60x = 779,264,723.50
5. Step 5: Solve for x
   x = 779,264,723.50/30,973.60
6. Step 6: Final answer
   x = 25,159.00