Finding the Fourth Proportional to 42,827.69, 64,204.60 and 20,610.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,827.69 : 64,204.60 = 20,610.51 : x
2. Step 2: Convert to fraction form
   42,827.69/64,204.60 = 20,610.51/x
3. Step 3: Cross multiply
   42,827.69x = 64,204.60 × 20,610.51
4. Step 4: Simplify right side
   42,827.69x = 1,323,289,550.35
5. Step 5: Solve for x
   x = 1,323,289,550.35/42,827.69
6. Step 6: Final answer
   x = 30,897.99