Finding the Fourth Proportional to 42,805.82, 64,214.86 and 13,226.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,805.82 : 64,214.86 = 13,226.18 : x
2. Step 2: Convert to fraction form
   42,805.82/64,214.86 = 13,226.18/x
3. Step 3: Cross multiply
   42,805.82x = 64,214.86 × 13,226.18
4. Step 4: Simplify right side
   42,805.82x = 849,317,297.03
5. Step 5: Solve for x
   x = 849,317,297.03/42,805.82
6. Step 6: Final answer
   x = 19,841.16