Finding the Fourth Proportional to 42,857.10, 64,294.83 and 21,800.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,857.10 : 64,294.83 = 21,800.07 : x
2. Step 2: Convert to fraction form
   42,857.10/64,294.83 = 21,800.07/x
3. Step 3: Cross multiply
   42,857.10x = 64,294.83 × 21,800.07
4. Step 4: Simplify right side
   42,857.10x = 1,401,631,794.64
5. Step 5: Solve for x
   x = 1,401,631,794.64/42,857.10
6. Step 6: Final answer
   x = 32,704.77