Finding the Fourth Proportional to 42,993.05, 64,489.98 and 13,007.53

Step by Step Solution

1. Step 1: Write the proportion equation
   42,993.05 : 64,489.98 = 13,007.53 : x
2. Step 2: Convert to fraction form
   42,993.05/64,489.98 = 13,007.53/x
3. Step 3: Cross multiply
   42,993.05x = 64,489.98 × 13,007.53
4. Step 4: Simplify right side
   42,993.05x = 838,855,027.10
5. Step 5: Solve for x
   x = 838,855,027.10/42,993.05
6. Step 6: Final answer
   x = 19,511.41