Finding the Fourth Proportional to 42,682.42, 64,062.36 and 21,637.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,682.42 : 64,062.36 = 21,637.10 : x
2. Step 2: Convert to fraction form
   42,682.42/64,062.36 = 21,637.10/x
3. Step 3: Cross multiply
   42,682.42x = 64,062.36 × 21,637.10
4. Step 4: Simplify right side
   42,682.42x = 1,386,123,689.56
5. Step 5: Solve for x
   x = 1,386,123,689.56/42,682.42
6. Step 6: Final answer
   x = 32,475.28