Finding the Fourth Proportional to 30,756.49, 42,445.53 and 18,816.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,756.49 : 42,445.53 = 18,816.10 : x
2. Step 2: Convert to fraction form
   30,756.49/42,445.53 = 18,816.10/x
3. Step 3: Cross multiply
   30,756.49x = 42,445.53 × 18,816.10
4. Step 4: Simplify right side
   30,756.49x = 798,659,337.03
5. Step 5: Solve for x
   x = 798,659,337.03/30,756.49
6. Step 6: Final answer
   x = 25,967.18