Finding the Fourth Proportional to 42,847, 64,297.10 and 20,662.64

Step by Step Solution

1. Step 1: Write the proportion equation
   42,847 : 64,297.10 = 20,662.64 : x
2. Step 2: Convert to fraction form
   42,847/64,297.10 = 20,662.64/x
3. Step 3: Cross multiply
   42,847x = 64,297.10 × 20,662.64
4. Step 4: Simplify right side
   42,847x = 1,328,547,830.34
5. Step 5: Solve for x
   x = 1,328,547,830.34/42,847
6. Step 6: Final answer
   x = 31,006.79