Finding the Third Proportional to 5,428.27 and 8,602.45

Step by Step Solution

1. Step 1: Write the proportion equation
   5,428.27 : 8,602.45 = 8,602.45 : x
2. Step 2: Convert to fraction form
   5,428.27/8,602.45 = 8,602.45/x
3. Step 3: Cross multiply
   5,428.27x = 8,602.45 × 8,602.45
4. Step 4: Simplify right side
   5,428.27x = 74,002,199.77
5. Step 5: Solve for x
   x = 74,002,199.77/5,428.27
6. Step 6: Final answer
   x = 13,632.75