Finding the Fourth Proportional to 42,700.35, 64,053.60 and 16,405.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,700.35 : 64,053.60 = 16,405.09 : x
2. Step 2: Convert to fraction form
   42,700.35/64,053.60 = 16,405.09/x
3. Step 3: Cross multiply
   42,700.35x = 64,053.60 × 16,405.09
4. Step 4: Simplify right side
   42,700.35x = 1,050,805,072.82
5. Step 5: Solve for x
   x = 1,050,805,072.82/42,700.35
6. Step 6: Final answer
   x = 24,608.82