Finding the Fourth Proportional to 42,807.21, 64,229.16 and 16,530.39

Step by Step Solution

1. Step 1: Write the proportion equation
   42,807.21 : 64,229.16 = 16,530.39 : x
2. Step 2: Convert to fraction form
   42,807.21/64,229.16 = 16,530.39/x
3. Step 3: Cross multiply
   42,807.21x = 64,229.16 × 16,530.39
4. Step 4: Simplify right side
   42,807.21x = 1,061,733,064.17
5. Step 5: Solve for x
   x = 1,061,733,064.17/42,807.21
6. Step 6: Final answer
   x = 24,802.67