Finding the Fourth Proportional to 42,857, 64,327.07 and 20,686.00

Step by Step Solution

1. Step 1: Write the proportion equation
   42,857 : 64,327.07 = 20,686.00 : x
2. Step 2: Convert to fraction form
   42,857/64,327.07 = 20,686.00/x
3. Step 3: Cross multiply
   42,857x = 64,327.07 × 20,686.00
4. Step 4: Simplify right side
   42,857x = 1,330,669,344.95
5. Step 5: Solve for x
   x = 1,330,669,344.95/42,857
6. Step 6: Final answer
   x = 31,049.05