Finding the Fourth Proportional to 42,845.48, 64,294.83 and 20,661.14

Step by Step Solution

1. Step 1: Write the proportion equation
   42,845.48 : 64,294.83 = 20,661.14 : x
2. Step 2: Convert to fraction form
   42,845.48/64,294.83 = 20,661.14/x
3. Step 3: Cross multiply
   42,845.48x = 64,294.83 × 20,661.14
4. Step 4: Simplify right side
   42,845.48x = 1,328,404,483.91
5. Step 5: Solve for x
   x = 1,328,404,483.91/42,845.48
6. Step 6: Final answer
   x = 31,004.54