Finding the Fourth Proportional to 45,603, 68,380.74 and 20,621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   45,603 : 68,380.74 = 20,621.52 : x
2. Step 2: Convert to fraction form
   45,603/68,380.74 = 20,621.52/x
3. Step 3: Cross multiply
   45,603x = 68,380.74 × 20,621.52
4. Step 4: Simplify right side
   45,603x = 1,410,114,797.52
5. Step 5: Solve for x
   x = 1,410,114,797.52/45,603
6. Step 6: Final answer
   x = 30,921.54