Finding the Fourth Proportional to 42,948.69, 64,429.11 and 13,369.51

Step by Step Solution

1. Step 1: Write the proportion equation
   42,948.69 : 64,429.11 = 13,369.51 : x
2. Step 2: Convert to fraction form
   42,948.69/64,429.11 = 13,369.51/x
3. Step 3: Cross multiply
   42,948.69x = 64,429.11 × 13,369.51
4. Step 4: Simplify right side
   42,948.69x = 861,385,563.59
5. Step 5: Solve for x
   x = 861,385,563.59/42,948.69
6. Step 6: Final answer
   x = 20,056.16