Finding the Fourth Proportional to 42,833.70, 64,213.58 and 20,616.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,833.70 : 64,213.58 = 20,616.52 : x
2. Step 2: Convert to fraction form
   42,833.70/64,213.58 = 20,616.52/x
3. Step 3: Cross multiply
   42,833.70x = 64,213.58 × 20,616.52
4. Step 4: Simplify right side
   42,833.70x = 1,323,860,556.34
5. Step 5: Solve for x
   x = 1,323,860,556.34/42,833.70
6. Step 6: Final answer
   x = 30,906.99