Finding the Third Proportional to 9,123 and 19,702.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123 : 19,702.50 = 19,702.50 : x
2. Step 2: Convert to fraction form
   9,123/19,702.50 = 19,702.50/x
3. Step 3: Cross multiply
   9,123x = 19,702.50 × 19,702.50
4. Step 4: Simplify right side
   9,123x = 388,188,506.25
5. Step 5: Solve for x
   x = 388,188,506.25/9,123
6. Step 6: Final answer
   x = 42,550.53