Finding the Fourth Proportional to 42,774, 64,118.34 and 20,581.08

Step by Step Solution

1. Step 1: Write the proportion equation
   42,774 : 64,118.34 = 20,581.08 : x
2. Step 2: Convert to fraction form
   42,774/64,118.34 = 20,581.08/x
3. Step 3: Cross multiply
   42,774x = 64,118.34 × 20,581.08
4. Step 4: Simplify right side
   42,774x = 1,319,624,685.01
5. Step 5: Solve for x
   x = 1,319,624,685.01/42,774
6. Step 6: Final answer
   x = 30,851.09