Finding the Fourth Proportional to 49,680.10, 74,494.55 and 18,499.30

Step by Step Solution

1. Step 1: Write the proportion equation
   49,680.10 : 74,494.55 = 18,499.30 : x
2. Step 2: Convert to fraction form
   49,680.10/74,494.55 = 18,499.30/x
3. Step 3: Cross multiply
   49,680.10x = 74,494.55 × 18,499.30
4. Step 4: Simplify right side
   49,680.10x = 1,378,097,028.82
5. Step 5: Solve for x
   x = 1,378,097,028.82/49,680.10
6. Step 6: Final answer
   x = 27,739.42