Finding the Fourth Proportional to 42,802.84, 64,145.94 and 20,614.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,802.84 : 64,145.94 = 20,614.60 : x
2. Step 2: Convert to fraction form
   42,802.84/64,145.94 = 20,614.60/x
3. Step 3: Cross multiply
   42,802.84x = 64,145.94 × 20,614.60
4. Step 4: Simplify right side
   42,802.84x = 1,322,342,894.72
5. Step 5: Solve for x
   x = 1,322,342,894.72/42,802.84
6. Step 6: Final answer
   x = 30,893.81