Finding the Fourth Proportional to 42,544.20, 63,855.63 and 21,499.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,544.20 : 63,855.63 = 21,499.05 : x
2. Step 2: Convert to fraction form
   42,544.20/63,855.63 = 21,499.05/x
3. Step 3: Cross multiply
   42,544.20x = 63,855.63 × 21,499.05
4. Step 4: Simplify right side
   42,544.20x = 1,372,835,382.15
5. Step 5: Solve for x
   x = 1,372,835,382.15/42,544.20
6. Step 6: Final answer
   x = 32,268.45