Finding the Fourth Proportional to 42,807.88, 64,224.54 and 20,614.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807.88 : 64,224.54 = 20,614.84 : x
2. Step 2: Convert to fraction form
   42,807.88/64,224.54 = 20,614.84/x
3. Step 3: Cross multiply
   42,807.88x = 64,224.54 × 20,614.84
4. Step 4: Simplify right side
   42,807.88x = 1,323,978,616.17
5. Step 5: Solve for x
   x = 1,323,978,616.17/42,807.88
6. Step 6: Final answer
   x = 30,928.39