Finding the Fourth Proportional to 42,682.91, 64,015.53 and 12,697.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,682.91 : 64,015.53 = 12,697.32 : x
2. Step 2: Convert to fraction form
   42,682.91/64,015.53 = 12,697.32/x
3. Step 3: Cross multiply
   42,682.91x = 64,015.53 × 12,697.32
4. Step 4: Simplify right side
   42,682.91x = 812,825,669.38
5. Step 5: Solve for x
   x = 812,825,669.38/42,682.91
6. Step 6: Final answer
   x = 19,043.35