Finding the Third Proportional to 5,280 and 12,316

Step by Step Solution

1. Step 1: Write the proportion equation
   5,280 : 12,316 = 12,316 : x
2. Step 2: Convert to fraction form
   5,280/12,316 = 12,316/x
3. Step 3: Cross multiply
   5,280x = 12,316 × 12,316
4. Step 4: Simplify right side
   5,280x = 151,683,856
5. Step 5: Solve for x
   x = 151,683,856/5,280
6. Step 6: Final answer
   x = 28,728.00