Finding the Fourth Proportional to 33,318, 45,981.72 and 18,416.88

Step by Step Solution

1. Step 1: Write the proportion equation
   33,318 : 45,981.72 = 18,416.88 : x
2. Step 2: Convert to fraction form
   33,318/45,981.72 = 18,416.88/x
3. Step 3: Cross multiply
   33,318x = 45,981.72 × 18,416.88
4. Step 4: Simplify right side
   33,318x = 846,839,819.43
5. Step 5: Solve for x
   x = 846,839,819.43/33,318
6. Step 6: Final answer
   x = 25,416.89