Finding the Fourth Proportional to 42,824.61, 64,200.03 and 20,607.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,824.61 : 64,200.03 = 20,607.42 : x
2. Step 2: Convert to fraction form
   42,824.61/64,200.03 = 20,607.42/x
3. Step 3: Cross multiply
   42,824.61x = 64,200.03 × 20,607.42
4. Step 4: Simplify right side
   42,824.61x = 1,322,996,982.22
5. Step 5: Solve for x
   x = 1,322,996,982.22/42,824.61
6. Step 6: Final answer
   x = 30,893.38