Finding the Fourth Proportional to 42,993.86, 64,465.88 and 16,667.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,993.86 : 64,465.88 = 16,667.78 : x
2. Step 2: Convert to fraction form
   42,993.86/64,465.88 = 16,667.78/x
3. Step 3: Cross multiply
   42,993.86x = 64,465.88 × 16,667.78
4. Step 4: Simplify right side
   42,993.86x = 1,074,502,699.68
5. Step 5: Solve for x
   x = 1,074,502,699.68/42,993.86
6. Step 6: Final answer
   x = 24,992.01