Finding the Third Proportional to 5,070.50 and 10,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,070.50 : 10,890.50 = 10,890.50 : x
2. Step 2: Convert to fraction form
   5,070.50/10,890.50 = 10,890.50/x
3. Step 3: Cross multiply
   5,070.50x = 10,890.50 × 10,890.50
4. Step 4: Simplify right side
   5,070.50x = 118,602,990.25
5. Step 5: Solve for x
   x = 118,602,990.25/5,070.50
6. Step 6: Final answer
   x = 23,390.79