Finding the Fourth Proportional to 42,949.69, 64,430.61 and 13,370.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,949.69 : 64,430.61 = 13,370.51 : x
2. Step 2: Convert to fraction form
   42,949.69/64,430.61 = 13,370.51/x
3. Step 3: Cross multiply
   42,949.69x = 64,430.61 × 13,370.51
4. Step 4: Simplify right side
   42,949.69x = 861,470,115.31
5. Step 5: Solve for x
   x = 861,470,115.31/42,949.69
6. Step 6: Final answer
   x = 20,057.66