Finding the Fourth Proportional to 42,658, 64,010.04 and 20,770

Step by Step Solution

1. Step 1: Write the proportion equation
   42,658 : 64,010.04 = 20,770 : x
2. Step 2: Convert to fraction form
   42,658/64,010.04 = 20,770/x
3. Step 3: Cross multiply
   42,658x = 64,010.04 × 20,770
4. Step 4: Simplify right side
   42,658x = 1,329,488,530.80
5. Step 5: Solve for x
   x = 1,329,488,530.80/42,658
6. Step 6: Final answer
   x = 31,166.22