Finding the Fourth Proportional to 42,947.58, 64,434.69 and 13,369.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,947.58 : 64,434.69 = 13,369.62 : x
2. Step 2: Convert to fraction form
   42,947.58/64,434.69 = 13,369.62/x
3. Step 3: Cross multiply
   42,947.58x = 64,434.69 × 13,369.62
4. Step 4: Simplify right side
   42,947.58x = 861,467,320.12
5. Step 5: Solve for x
   x = 861,467,320.12/42,947.58
6. Step 6: Final answer
   x = 20,058.58