Finding the Third Proportional to 25,688.81 and 38,428.78

Step by Step Solution

1. Step 1: Write the proportion equation
   25,688.81 : 38,428.78 = 38,428.78 : x
2. Step 2: Convert to fraction form
   25,688.81/38,428.78 = 38,428.78/x
3. Step 3: Cross multiply
   25,688.81x = 38,428.78 × 38,428.78
4. Step 4: Simplify right side
   25,688.81x = 1,476,771,228.36
5. Step 5: Solve for x
   x = 1,476,771,228.36/25,688.81
6. Step 6: Final answer
   x = 57,486.94